MOTOR DRIVING CIRCUIT, APPLICATION DEVICE INCLUDING THE SAME, AND BRAKING METHOD FOR A MOTOR
First Claim
1. A motor driving circuit comprising:
- an inverter configured to drive a motor;
a braking unit comprising a sampling circuit, a discharge circuit and a switch group, the sampling circuit and the discharge circuit being connected to the inverter, the switch group being configured to output an emergency signal when an emergency occurs;
a MCU connected to the sampling circuit, the discharge circuit, and the switch group, and configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range.
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Accused Products
Abstract
A motor driving circuit, an application device, and a motor braking method are provided. The driving circuit includes an inverter, a braking unit, and a MCU. The inverter is configured to drive a motor. The braking unit includes a sampling circuit, a discharge circuit, and a switch group. The MCU is connected to the sampling circuit, the discharge circuit, and the switch group, and is configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range.
22 Citations
19 Claims
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1. A motor driving circuit comprising:
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an inverter configured to drive a motor; a braking unit comprising a sampling circuit, a discharge circuit and a switch group, the sampling circuit and the discharge circuit being connected to the inverter, the switch group being configured to output an emergency signal when an emergency occurs; a MCU connected to the sampling circuit, the discharge circuit, and the switch group, and configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19)
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11. An application device, comprising:
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a motor; and a motor driving circuit, comprising; an inverter configured to drive the motor, comprising two input terminals; a braking unit comprising a sampling circuit, a discharge circuit and a switch group, the sampling circuit and the discharge circuit being connected to the inverter, the switch group being configured to output an emergency signal when an emergency occurs; a MCU connected to the sampling circuit, the discharge circuit, and the switch group, and configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range. - View Dependent Claims (12, 13, 14)
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Specification