Control device of electric sealed compressor, electric sealed compressor apparatus, and home appliance comprising control device and electric sealed compressor apparatus

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.

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.