A motor control circuit

A control circuit and motor control technology, applied in the direction of motor control, control system, electrical components, etc., can solve the problem of motor damage to user experience, and achieve the effects of improving user experience, reducing damage, and avoiding abnormal noise

Active Publication Date: 2018-09-07
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a motor control circuit, aiming to solve the problem of easy damage to the motor and poor user experience caused by the abnormal noise generated by the motor when the existing control circuit is abnormally powered off. And other issues

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The embodiment of the present invention discloses a motor control circuit, refer to figure 2 , the motor control circuit may include:

[0047] The motor power supply circuit 100 is used to supply power to the motor;

[0048] Motor speed control circuit 200, used to control the motor speed;

[0049] The motor speed detection circuit 300 is used to detect the motor speed, and feed back the detected motor speed to the motor speed control circuit to form...

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Abstract

The invention discloses a motor control circuit. The motor control circuit includes a motor power supply circuit, a motor rotation speed control circuit, a motor rotation speed detection circuit and a driving switching circuit; the driving switching circuit is used for outputting corresponding rotation speed driving signals to a motor when the motor rotation speed control circuit is abnormal so as to maintain the normal stop and rotation of the motor. According to the motor control circuit of the invention, the driving control circuit is additionally adopted in the motor control circuit, and thus, when the motor control circuit is powered off abnormally, and the output of the rotation speed driving signals to the motor is stopped suddenly, the other rotation speed driving signals can be provided, and therefore, normal rotation of the motor can be maintained, namely, the operation of the motor is maintained for a short period, and the motor stops rotating slowly, and as a result, with the motor control circuit of the invention adopted, the above problem in the prior art can be solved, and the generation of abnormal noises can be avoided, and damage to the motor caused by sudden power outage can be reduced, and user experience can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a motor control circuit. Background technique [0002] The control signals of high-voltage DC motors mainly include VDC (Volts Direct Current, volts direct current), VCC (Volt Current Condenser, power supply), VSP (Voltage Speed ​​Prescription, speed command voltage) and VFB (Voltage Feed Back, feedback voltage), among which , VDC is provided by the 310V direct current obtained after rectification of the AC mains, which is used to supply power to the motor; VCC is +15V, which is used to supply power to the control board in the motor; VSP is the driving signal for controlling the motor speed, which is provided by the controller; VFB is the speed signal fed back from the motor end. [0003] At present, the control circuit of high-voltage DC motor generally adopts figure 1 In the shown structure, the first power supply module 1 provides VDC and VCC to suppl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/028
Inventor 敬仕林余飞燕胡逢亮李文灿
Owner GREE ELECTRIC APPLIANCES INC
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