Motor speed regulation plate and motor system

Abstract

The invention discloses a motor speed regulation board which comprises a controller, a driving circuit and a switching circuit, the controller outputs a control signal to the driving circuit after receiving an external control signal related to motor speed regulation, and the driving circuit completes chopping by controlling the on-time and the off-time of a switching tube in the switching circuit. And the motor completes speed regulation according to the duty ratio after acquiring a switching signal of the switching circuit. Compared with the prior art, according to the scheme, a filter inductor and a filter capacitor are removed from the speed regulation circuit, meanwhile, the power loss of a filter part is removed, the additional heat power consumption of the system is reduced, and the speed regulation efficiency of the system is improved. Meanwhile, a large-current inductor is not needed for filtering, so that the hardware cost of the speed regulation system is reduced. In addition, the invention further discloses a motor system, the motor system comprises the motor speed regulation plate, and the above beneficial effects can be achieved correspondingly.

Description

technical field [0001] The present application relates to the technical field of power electronic equipment, in particular to a motor speed control board and a motor system. Background technique [0002] DC brushed motors have good start-up and speed regulation performance, and are often used in occasions that have high requirements for start-up and speed regulation, such as large reversible rolling mills, planers, electric locomotives, papermaking and printing machinery, ship machinery, large Production machinery such as precision machine tools and large cranes. [0003] The traditional brushed DC motor achieves speed regulation by adjusting the power supply voltage. After detecting the rotation speed of the motor, a method of reducing the power supply from high voltage to low voltage is used to control the speed. figure 1 The DC brush motor speed control system topology diagram provided for the existing technology, such as figure 1 As shown, in the prior art, when adjust...

AI Technical Summary

Problems solved by technology

figure 1 The DC brush motor speed control system topology diagram provided for the existing technology, such as figure 1 As shown, in the prior art, when adjusting the speed of a high-power motor, filter devices such as a large inductance L0 and a capacitor C0 need to be added to the circuit. higher

In addition, adding a large inductor L0 to cooperate with the chopper circuit to realize speed regulation makes the cost of the speed regulation system higher

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