Control method and control system of stepping motor

Abstract

The present invention provides a stepper motor control method and a stepper motor control system, wherein the stepper motor control method includes: in one operation cycle of the stepper motor, controlling the The first winding and the second winding input the direct current of the first frequency, so as to simultaneously drive the stepping motor through the first winding and the second winding; When the predetermined value is reached, control is only to input the direct current of the second frequency to any one of the first winding and the second winding, so as to continue to drive the stepping motor through the any one of the windings. The technical solution of the present invention can reduce the possibility of the stepper motor stalling during the operation of driving the moving parts, and at the same time avoid the potential safety hazard caused by the excessive torque of the stepper motor.

Description

technical field [0001] The invention relates to the technical field of stepping motors, in particular to a control method and a control system for a stepping motor. Background technique [0002] At present, the motion mechanism in the indoor unit of the air conditioner usually uses a stepper motor as the driving device. This type of stepper motor usually has the characteristics of low power, low current, and low speed. It mainly completes the drive of small torque moving parts, such as air guide strips , wind swing device and other structures, in the process of use, it is necessary to ensure that its operation process is quiet and safe. [0003] With the continuous increase of air conditioner functions, the demand for stepper motors with high torque and high current is increasing, especially in the opening and closing mechanism of air conditioners. However, when the stepping motor with a large torque and a large current drives the closing mechanism to close and run, due to ...

AI Technical Summary

Problems solved by technology

However, when the stepping motor with a large torque and a large current drives the closing mechanism to close and run, due to reasons such as excessive load current and heavy load, the motor will be blocked for a short time in the latter part of the operating cycle. And the locked rotor will cause a lot of locked rotor noise, which will affect the user experience

In addition, if the torque of the stepper motor is too large during the closing operation of the closing mechanism, there will be a potential safety hazard of pinching users and animals near the closing mechanism

[0004] Therefore, how to reduce the possibility of the stepper motor stalling during the operation of driving the moving parts, and at the same time avoid the potential safety hazard caused by the excessive torque of the stepper motor has become a technical problem to be solved urgently

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