# US 9,520,815 B2 · Control device of electric sealed compressor, electric sealed compressor apparatus, and home appliance comprising control device and electric sealed compressor apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,815 B2 - Document ID: US9520815B2 - Status: Granted - Kind: B2 - Application number: 14/414,037 - Filed: 2013-07-08 - Published: 2015-07-30 - Granted: 2016-12-13 - Earliest claimed: 2012-07-09 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Masaki Sumi; Shigetomi Tokunaga; Hiroaki Kase; Masamitsu Taura; Mitsuhiro Fukuda - Web page: https://patentgrep.com/patent/US9520815B2 ## CPC - H02P 3/02: Details {of stopping control} - F04B 35/04: the means being electric - F04B 49/06: Control using electricity (regulating by means of floats actuating electric switches F04B49/04) - H02H 7/0844: {Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error} - H02M 1/32: Means for protecting converters other than automatic disconnection - H02M 7/53875: {with analogue control of three-phase output} - H02P 29/0241: {the fault being an overvoltage} - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A control device (100) of an electric sealed compressor of the present invention comprises a power converter (30) which supplies electric power to an electric motor (5) of the electric sealed compressor; a driving circuit (27) which drives the power converter (30); abnormality detector (40) which detects abnormality in an abnormality detection region including the power converter (30) and the driving circuit (27); a controller (11) configured to output a control signal for driving the power converter to the driving circuit (27) and stop outputting the control signal in response to a signal (Fo signal) output from the abnormality detector (40), the signal indicating that the abnormality has been detected; and an auxiliary protection circuit (50) configured to deactivate the driving circuit (27) in response to the signal output from the abnormality detector (40), the signal indicating that the abnormality has been detected. ## Claims ### Claim 1 A control device of an electric sealed compressor comprising: an intelligent power module including a power converter which supplies electric power to an electric motor of the electric sealed compressor; a driving circuit which drives the power converter; and an abnormality detection element which detects abnormality in an abnormality detection region including the power converter and the driving circuit; a controller configured to output a control signal for driving the power converter to the driving circuit and stop outputting the control signal in response to a signal output from the abnormality detection element, the signal indicating that the abnormality has been detected; and an auxiliary protection circuit configured to deactivate the driving circuit in response to the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, wherein the auxiliary protection circuit includes a signal holding circuit which outputs an operation signal which is a binary signal with a first level or a second level; and an emergency shut-down circuit which receives the operation signal as an input, wherein the signal holding circuit is configured to output the operation signal with the second level when the control device of the electric sealed compressor is started-up, to output the operation signal with the first level when the signal holding circuit receives the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, and to continue to output the operation signal with the first level after a state is formed, in which the signal output from the abnormality detection element does not indicate that the abnormality has been detected, and wherein the emergency shut-down circuit is configured to set a power supply voltage of the driving circuit to a voltage which is equal to or lower than a specified voltage at which the driving circuit is deactivated due to voltage insufficiency, to deactivate the driving circuit, when the operation signal is the first level, and to set the power supply voltage of the driving circuit to a voltage which is higher than the specified voltage, to cause the driving circuit to be activated, when the operation signal is the second level. ### Claim 2 (depends on 1) The control device of the electric sealed compressor according to claim 1, further comprising: an abnormality detector which converts the signal output from the abnormality detection element into an abnormality detection signal which is a binary signal with one of two levels corresponding to whether or not the signal indicates that the abnormality has been detected and outputs the abnormality detection signal to the controller; wherein the controller is configured to stop outputting the control signal in response to the abnormality detection signal received from the abnormality detector, when the abnormality detection signal has the level indicating that the abnormality has been detected. ### Claim 3 (depends on 2) The control device of the electric sealed compressor according to claim 2, further comprising: an amplifier which amplifies the signal output from the abnormality detection element; wherein the auxiliary protection circuit is configured to deactivate the driving circuit when a level of a signal output from the amplifier falls within a predetermined level range indicating that the abnormality detection element has detected the abnormality. ### Claim 4 (depends on 2) The control device of the electric sealed compressor according to claim 2, wherein the abnormality detector is configured to output the abnormality detection signal to the auxiliary protection circuit; and wherein the auxiliary protection circuit is configured to deactivate the driving circuit in response to the abnormality detection signal received from the abnormality detector, when the abnormality detection signal has the level indicating that the abnormality has been detected. ### Claim 5 (depends on 1) The control device of the electric sealed compressor according to claim 1, wherein the signal holding circuit is configured to automatically output the operation signal with the second level when a predetermined time passes after the signal holding circuit outputs the operation signal with the first level. ### Claim 6 (depends on 5) The control device of the electric sealed compressor according to claim 5, wherein the signal holding circuit includes a monostable multivibrator circuit which is configured to operate in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal output in a stable state corresponds to the second level of the operation signal and a signal output in an unstable state corresponds to the first level of the operation signal. ### Claim 7 (depends on 5) The control device of the electric sealed compressor according to claim 5, wherein the signal holding circuit includes a timer circuit which is configured to operate for a set time in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal in a non-operating state corresponds to the second level of the operation signal and a signal in an operating state corresponds to the first level of the operation signal. ### Claim 8 (depends on 1) The control device of the electric sealed compressor according to claim 1, wherein the signal holding circuit is configured to output the operation signal with the second level in response to a reset signal input to the signal holding circuit, after the signal holding circuit outputs the operation signal with the first level. ### Claim 9 (depends on 8) The control device of the electric sealed compressor according to claim 8, wherein the signal holding circuit includes a flip flop circuit configured such that the signal output from the abnormality detection element is input to a set terminal, the reset signal is input to a reset terminal, a signal output in response to the reset signal corresponds to the second level of the operation signal, and a signal output in response to the signal received from the abnormality detection element, indicating that the abnormality has been detected, corresponds to the first level of the operation signal. ### Claim 10 (depends on 1) The control device of the electric sealed compressor according to claim 1, wherein the abnormality detection element is a current detection element which detects an input current or an output current of the power converter, and the signal output from the abnormality detection element, indicating that the abnormality has been detected, indicates that the input current or the output current is overcurrent which is equal to or higher than a predetermined current value. ### Claim 11 (depends on 1) An electric sealed compressor apparatus comprising: the control device of the electric sealed compressor as recited in claim 1; and an electric sealed compressor. ### Claim 12 (depends on 11) A home appliance comprising the electric sealed compressor apparatus as recited in claim 11. ### Claim 13 A control device of an electric sealed compressor, comprising: an intelligent power module including a power converter which supplies electric power to an electric motor of the electric sealed compressor; a driving circuit which drives the power converter; and an abnormality detection element which detects abnormality in an abnormality detection region including the power converter and the driving circuit; a controller configured to output a control signal for driving the power converter to the driving circuit and stop outputting the control signal in response to a signal output from the abnormality detection element, the signal indicating that the abnormality has been detected; and an auxiliary protection circuit configured to deactivate the driving circuit in response to the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, wherein the auxiliary protection circuit includes a signal holding circuit which outputs an operation signal which is a binary signal with a first level or a second level; and an emergency shut-down circuit which receives the operation signal as an input, wherein the signal holding circuit is configured to output the operation signal with the second level when the control device of the electric sealed compressor is started-up, to output the operation signal with the first level when the signal holding circuit receives the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, and to continue to output the operation signal with the first level after a state is formed, in which the signal output from the abnormality detection element does not indicate that the abnormality has been detected, wherein the emergency shut-down circuit is configured to disconnect the driving circuit from a power supply, to deactivate the driving circuit, when the operation signal is the first level, and to connect the driving circuit to the power supply to cause the driving circuit to be activated, when the operation signal is the second level. ### Claim 14 (depends on 13) The control device of the electric sealed compressor according to claim 13, wherein the signal holding circuit is configured to automatically output the operation signal with the second level when a predetermined time passes after the signal holding circuit outputs the operation signal with the first level. ### Claim 15 (depends on 14) The control device of the electric sealed compressor according to claim 14, wherein the signal holding circuit includes a monostable multivibrator circuit which is configured to operate in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal output in a stable state corresponds to the second level of the operation signal and a signal output in an unstable state corresponds to the first level of the operation signal. ### Claim 16 (depends on 14) The control device of the electric sealed compressor according to claim 14, wherein the signal holding circuit includes a timer circuit which is configured to operate for a set time in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal in a non-operating state corresponds to the second level of the operation signal and a signal in an operating state corresponds to the first level of the operation signal. ### Claim 17 (depends on 13) The control device of the electric sealed compressor according to claim 13, wherein the signal holding circuit is configured to output the operation signal with the second level in response to a reset signal input to the signal holding circuit, after the signal holding circuit outputs the operation signal with the first level. ### Claim 18 (depends on 17) The control device of the electric sealed compressor according to claim 17, wherein the signal holding circuit includes a flip flop circuit configured such that the signal output from the abnormality detection element is input to a set terminal, the reset signal is input to a reset terminal, a signal output in response to the reset signal corresponds to the second level of the operation signal, and a signal output in response to the signal received from the abnormality detection element, indicating that the abnormality has been detected, corresponds to the first level of the operation signal. ### Claim 19 (depends on 13) The control device of the electric sealed compressor according to claim 13, wherein the abnormality detection element is a current detection element which detects an input current or an output current of the power converter, and the signal output from the abnormality detection element, indicating that the abnormality has been detected, indicates that the input current or the output current is overcurrent which is equal to or higher than a predetermined current value. ### Claim 20 (depends on 13) An electric sealed compressor apparatus comprising the control device as recited in claim 13; and an electric sealed compressor. ### Claim 21 (depends on 20) A home appliance comprising the electric sealed compressor apparatus as recited in claim 20. ### Claim 22 A control device of an electric sealed compressor, comprising: an intelligent power module including a power converter which supplies electric power to an electric motor of the electric sealed compressor; a driving circuit which drives the power converter; and an abnormality detection element which detects abnormality in an abnormality detection region including the power converter and the driving circuit; a controller configured to output a control signal for driving the power converter to the driving circuit and stop outputting the control signal in response to a signal output from the abnormality detection element, the signal indicating that the abnormality has been detected; and an auxiliary protection circuit configured to deactivate the driving circuit in response to the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, wherein the auxiliary protection circuit includes a signal holding circuit which outputs an operation signal which is a binary signal with a first level or a second level; and an emergency shut-down circuit which receives the operation signal as an input, wherein the signal holding circuit is configured to output the operation signal with the second level when the control device of the electric sealed compressor is started-up, to output the operation signal with the first level when the signal holding circuit receives the signal output from the abnormality detection element, the signal indicating that the abnormality has been detected, and to continue to output the operation signal with the first level after a state is formed, in which the signal output from the abnormality detection element does not indicate that the abnormality has been detected, wherein the emergency shut-down circuit is configured to disconnect a path through which the control signal is supplied to the driving circuit, to deactivate the driving circuit, when the operation signal is the first level, and to establish the path to cause the driving circuit to be activated, when the operation signal is the second level. ### Claim 23 (depends on 22) The control device of the electric sealed compressor according to claim 22, wherein the signal holding circuit is configured to automatically output the operation signal with the second level when a predetermined time passes after the signal holding circuit outputs the operation signal with the first level. ### Claim 24 (depends on 23) The control device of the electric sealed compressor according to claim 23, wherein the signal holding circuit includes a monostable multivibrator circuit which is configured to operate in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal output in a stable state corresponds to the second level of the operation signal and a signal output in an unstable state corresponds to the first level of the operation signal. ### Claim 25 (depends on 23) The control device of the electric sealed compressor according to claim 23, wherein the signal holding circuit includes a timer circuit which is configured to operate for a set time in response to as a trigger the signal received from the abnormality detection element, indicating that the abnormality has been detected, and is configured such that a signal in a non-operating state corresponds to the second level of the operation signal and a signal in an operating state corresponds to the first level of the operation signal. ### Claim 26 (depends on 22) The control device of the electric sealed compressor according to claim 22, wherein the signal holding circuit is configured to output the operation signal with the second level in response to a reset signal input to the signal holding circuit, after the signal holding circuit outputs the operation signal with the first level. ### Claim 27 (depends on 26) The control device of the electric sealed compressor according to claim 26, wherein the signal holding circuit includes a flip flop circuit configured such that the signal output from the abnormality detection element is input to a set terminal, the reset signal is input to a reset terminal, a signal output in response to the reset signal corresponds to the second level of the operation signal, and a signal output in response to the signal received from the abnormality detection element, indicating that the abnormality has been detected, corresponds to the first level of the operation signal. ### Claim 28 (depends on 22) The control device of the electric sealed compressor according to claim 22, wherein the abnormality detection element is a current detection element which detects an input current or an output current of the power converter, and the signal output from the abnormality detection element, indicating that the abnormality has been detected, indicates that the input current or the output current is overcurrent which is equal to or higher than a predetermined current value. ### Claim 29 (depends on 22) An electric sealed compressor apparatus comprising the control device as recited in claim 22; and an electric sealed compressor. ### Claim 30 (depends on 29) A home appliance comprising the electric sealed compressor apparatus as recited in claim 29.