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US 10,897,221 B2Granted
Motor control circuit and motor controller
AssigneeMitsumi Electric Co., Ltd.
InventorsMakio Abe, Takatoshi Itagaki, Shu Hayashi, Masato Aoki
Life of this patent
Estimating the term…
Abstract
A motor control circuit includes a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates. The motor control circuit includes a determination circuit configured to determine whether the motor malfunctions or deteriorates based on the determination value to output, as an interrupt signal, a signal indicating that the motor malfunctions or deteriorates to the control circuit.
Claims9
A motor control circuit comprising:
- a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor;
- a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates;
- a determination circuit configured to determine whether the motor malfunctions or deteriorates based on the determination value to output, as an interrupt signal, a signal indicating that the motor malfunctions or deteriorates to the control circuit;
- and
- a notification terminal electrically coupled to the determination circuit, the notification terminal being configured to give, to an external system, an indication of the motor malfunctioning or deteriorating,
- wherein the determination circuit is configured to set a first voltage applied to the notification terminal upon detecting, based on a comparison between the determination value and a preset threshold, the determination value being greater than or equal to the threshold, the first voltage having a different value from a second voltage applied to the notification terminal, and the second voltage being set upon detecting the determination value being smaller than the threshold.
3 more elements
A motor control circuit comprising:
- a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor;
- a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates;
- and
- a determination circuit configured to, determine whether the motor malfunctions or deteriorates based on the determination value to output, as an interrupt sianal, a signal indicating that the motor malfunctions or deteriorates to the control circuit,
- wherein the motor includes at least two temperature detecting units configured to detect temperatures at respective different points,
- wherein the determination-information generating circuit is configured to generate the at least one determination value being a plurality of determination values in response to receiving respective temperatures detected by the temperature detecting units, and
- wherein the determination circuit is configured to indicate, to an external system, information indicating that the motor malfunctions or deteriorates upon detecting, based on the generated determination values, a first temperature difference. being greater than a first threshold, the first temperature difkrence being a difference between the respective temperatures detected by the temperature detecting units.
4 more elements
A motor control circuit comprising:
- a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor;
- a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates;
- a determination circuit configured to determine whether the motor malfunctions or deteriorates based on the determination value to output a signal indicating that the motor malfunctions or deteriorates to the control circuit;
- and
- a notification terminal electrically coupled to the determination circuit, the notification terminal being configured to give, to an external system, an indication of the motor malfunctioning or deteriorating,
- wherein the determination circuit is configured to set a first voltage applied to the notification terminal upon detecting, based on a comparison between the determination value and a preset threshold, the determination value being greater than or equal to the threshold, the first voltage having a different value from a second voltage applied to the notification terminal, and the second voltage being set upon detecting the determination value being smaller than the threshold.
3 more elements
Dependencies are inferred from the claim text.