A constant torque control method of ecm motor applied to fan system

A fan system and control method technology, applied in the direction of single motor speed/torque control, etc., can solve the problems that affect the user's air volume requirements, affect the user's quiet experience, and low motor speed, so as to improve user experience and improve user experience Experience, the effect of improving reliability

Active Publication Date: 2022-07-15
ZHONGSHAN BROAD OCEAN
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a constant torque control method for ECM motors, which solves the problem of constant torque control methods for ECM motors used in fan systems in the prior art, without limiting the maximum and minimum speeds. The noise and vibration are too large, which affects the user's experience of silence. Because the vibration is large, it will cause fatigue of mechanical parts, shorten the life, and the motor speed will be too low, which will affect the technical problem of the user's requirements for air volume.

Method used

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  • A constant torque control method of ecm motor applied to fan system
  • A constant torque control method of ecm motor applied to fan system
  • A constant torque control method of ecm motor applied to fan system

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Embodiment Construction

[0029] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0030] like figure 1 , figure 2 , image 3 As shown, the ECM motor usually consists of a motor controller 2 and a motor unit 1. The motor unit 1 includes a stator assembly 12, a rotor assembly 13 and a casing assembly 11. The stator assembly 13 is mounted on the casing assembly 11, and the motor The single unit 1 is equipped with a Hall sensor 14 for detecting the position of the rotor, the rotor assembly 13 is assembled inside or outside the stator assembly 12, and the motor controller 2 includes a control box 22 and a control circuit board 21 installed in the control box 22. The circuit board 21 generally includes a power supply circuit, a microprocessor, a bus current detection circuit, an inverter circuit and a rotor position measurement circuit 15 (ie, a Hall sensor). Input to the microprocessor, the busbar current d...

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Abstract

The invention discloses a constant torque control method of an ECM motor applied to a fan system. It is necessary to first set the maximum operating speed spd_max_ref and the minimum operating speed spd_min_ref of the motor within the constant torque operating range; Control to obtain the corresponding upper limit torque T_ref_up; use spd_min_ref as the reference command to perform constant speed PI control to obtain the corresponding lower limit torque T_ref_low, T_ref_up>T_ref_low; receive external torque command value Tcom; compare the values ​​of Tcom, T_ref_up and T_ref_low, and finally determine Tact value, and then control the motor to perform constant torque control operation with Tact as the target torque value; it can run stably in the full speed range, improve the user experience and improve the reliability of the product; the corresponding speed at the critical point of the speed limit will not generate shock.

Description

technical field [0001] The present invention relates to a constant torque control method of an ECM motor applied to a fan system. Background technique [0002] At present, many fan systems use ECM motors as power sources. ECM motors are referred to as electronically commutated motors, and can also be called DC brushless permanent magnet synchronous motors. Due to the different use environments of ECM motors, the control modes of ECM motors generally include: constant speed control , constant torque control and constant air volume control, etc. Constant torque control is a more commonly used mode. Currently, the vector control method is commonly used. The vector control mathematical model is complex, the calculation is cumbersome, it requires a CPU with strong computing power, and the manufacturing cost is high. See the application The number is CN201811334775.7, and the name is a constant torque control method based on a position sensorless vector control permanent magnet sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08
CPCH02P6/08
Inventor 边文清张先胜官金仁
Owner ZHONGSHAN BROAD OCEAN
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