# US 2013/0152609 A1 · Heat pump device, heat pump system, and a control method of three-phase inverter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152609 A1 - Document ID: US20130152609A1 - Status: Published application - Kind: A1 - Application number: 13/818,132 - Filed: 2010-08-30 - Published: 2013-06-20 - Earliest claimed: 2010-08-30 - Assignees: Mitsubishi Electric Corporation - Inventors: Kazunori Hatakeyama; Takuya Shimomugi; Shinya Matsushita; Naoki Wakuta; Tsutomu Makino; Shinsaku Kusube - Web page: https://patentgrep.com/patent/US20130152609A1 ## CPC - F25B 49/025: {Motor control arrangements} - B60H 1/143: {the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries} - H02M 7/53875: {with analogue control of three-phase output} - H02P 6/14: Electronic commutators - H02P 6/15: Controlling commutation time - H02P 29/62: for raising the temperature of the motor - F25B 30/02: of the compression type - F25B 2600/021: Inverters therefor - F25B 2700/2106: of fresh outdoor air - Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - 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) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An adder adds a phase θplus, which is n times a size of 60 degrees, to a phase output from a phase switching unit and outputs the phase as a voltage command phase θ. A voltage generation unit generates voltage command value based on the voltage command phase output by the adder and outputs the command value. A drive-signal generation unit, based on an output from the voltage generation unit generates drive signals corresponding to respective switching elements of an inverter, and outputs respective generated drive signals to the corresponding switching elements of the inverter, and generates a high-frequency AC voltage in the inverter. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A heat pump device comprising: a compressor having a compression mechanism that compresses a refrigerant; a motor that operates the compression mechanism provided in the compressor; an inverter; and an inverter control unit that controls the inverter, wherein the inverter control unit includes a phase switching unit, an addition unit that changes a value n, which is an integer equal to or larger than 0, for every predetermined time, and outputs a phase θ3 obtained by adding a phase θplus, which is n times a size of 60 degrees, to the phase output from the phase switching unit, a voltage generation unit that generates a voltage command value based on the phase θ3 output by the addition unit and outputs the voltage command value, and a drive-signal generation unit that, based on an output from the voltage generation unit, generates drive signals corresponding to respective switching elements of the inverter, outputs respective generated drive signals to the corresponding switching elements of the inverter, and generates a high-frequency AC voltage in the inverter. ### Claim 17 (depends on 16) The heat pump device according to claim 16, wherein the phase switching unit switches a phase θ1 and a phase θ2 different from the phase θ1 substantially by 180 degrees and outputs the phase, synchronously with a reference signal having a predetermined frequency. ### Claim 18 (depends on 16) The heat pump device according to claim 16, wherein the inverter is a three-phase inverter, the drive-signal generation unit outputs a drive signal that turns on one of two switching elements in each series-connected circuit of the three-phase inverter and turns off the other, and outputs a drive signal having a switching pattern in which one or two switching elements, among switching elements on a positive voltage side of the three-phase inverter, are turned on, in such a manner that only one pattern is output in a half-cycle period of the reference signal. ### Claim 19 (depends on 16) The heat pump device according to claim 16, further comprising: an amplitude output unit that outputs an amplitude A having a predetermined width, in such a manner that when the addition unit changes the value n, the amplitude A is decreased, and after the addition unit has changed the value n, the amplitude A is gradually increased to return to the original predetermined width, wherein the voltage generation unit generates the voltage command value based on the phase θ3 output from the addition unit and the amplitude A output from the amplitude output unit. ### Claim 20 (depends on 16) The heat pump device according to claim 16, further comprising: a drive circuit that drives the switching elements in the series-connected circuit of the inverter, wherein the drive circuit includes a negative-voltage-side drive circuit driven by a voltage of a switching power source to drive the switching element on a negative voltage side of the inverter, and a positive-voltage-side drive circuit driven by a voltage of a capacitor charged by driving the negative-voltage-side drive circuit to drive the switching element on a positive voltage side of the inverter, and the inverter control unit drives the negative-voltage-side drive circuit when the addition unit changes the value n and charges the capacitor with the voltage. ### Claim 21 (depends on 16) The heat pump device according to claim 16, wherein the voltage generation unit outputs an AC voltage command value having a frequency higher than an operating frequency at a time of a compression operation of the motor. ### Claim 22 (depends on 16) The heat pump device according to claim 16, wherein the phase switching unit switches the phase at timings of at least any of tops and bottoms of the reference signal. ### Claim 23 (depends on 16) The heat pump device according to claim 16, wherein a rotor of the motor has an IPM (Interior Permanent Magnet) structure. ### Claim 24 (depends on 16) The heat pump device according to claim 16, wherein the inverter control unit further includes a detection unit that detects a state where an outside air temperature has risen by more than a predetermined temperature, as compared to a temperature before a predetermined time, and when the detection unit has detected the state, the voltage generation unit outputs the voltage command value. ### Claim 25 (depends on 16) The heat pump device according to claim 16, further comprising a detection unit that detects that a state where a temperature of the compressor is lower than the outside air temperature continues for a predetermined time, wherein when the detection unit has detected the state, the voltage generation unit outputs the voltage command value. ### Claim 26 (depends on 16) The heat pump device according to claim 16, wherein the voltage generation unit outputs the voltage command value, every time the predetermined time has passed since shutting down the compressor. ### Claim 27 (depends on 16) The heat pump device according to claim 16, wherein the switching elements constituting the inverter are wide gap semiconductors. ### Claim 28 (depends on 27) The heat pump device according to claim 27, wherein the wide gap semiconductors are made of any one of SiC, GaN, or diamond. ### Claim 29 (depends on 16) The heat pump device according to claim 16, wherein the switching elements constituting the inverter are MOSFETs having a super junction structure. ### Claim 30 A heat pump system comprising: a heat pump device including a refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are sequentially connected by a pipe; and a fluid using device that uses a fluid heat-exchanged with a refrigerant in the first heat exchanger connected to the refrigerant circuit, wherein the heat pump device includes the compressor having a compression mechanism that compresses the refrigerant, a motor that operates the compression mechanism provided in the compressor, an inverter, and an inverter control unit that controls the inverter, wherein the inverter control unit includes a phase switching unit that switches a phase θ1 and a phase θ2 different from the phase θ1 substantially by 180 degrees and outputs the phase, synchronously with a reference signal having a predetermined frequency, an addition unit that changes a value n, which is an integer equal to or larger than 0, for every predetermined time, and outputs a phase θ3 obtained by adding a phase θplus, which is n times a size of 60 degrees, to the phase output from the phase switching unit, a voltage generation unit that generates a voltage command value based on the phase θ3 output by the addition unit and outputs the command value, and a drive-signal generation unit that compares the voltage command value output from the voltage generation unit with the reference signal to generate drive signals corresponding to respective switching elements of the inverter, outputs respective generated drive signals to the corresponding switching elements of the inverter, and generates a high-frequency AC voltage in the inverter. ### Claim 31 A control method for an inverter in a heat pump device that includes a compressor having a compression mechanism for compressing a refrigerant, a motor that operates the compression mechanism provided in the compressor, and an inverter, wherein the inverter control method comprises: a phase switching step at which a phase θ1 and a phase θ2 different from the phase θ1 substantially by 180 degrees are switched and output, synchronously with a reference signal having a predetermined frequency; an adding step at which a value n, which is an integer equal to or larger than 0, is changed for every predetermined time, to output a phase θ3 obtained by adding a phase θplus, which is n times a size of 60 degrees, to the phase output from the phase switching step; a voltage generating step at which a voltage command value is generated based on the phase θ3 output at the adding step and output; and a drive-signal generating step at which the voltage command value output from the voltage generation step is compared with the reference signal to generate drive signals corresponding to respective switching elements of the inverter, respective generated drive signals are output to the corresponding switching elements of the inverter, and a high-frequency AC voltage is generated in the inverter.