A kind of reverse series control system and method of three DC motors

Abstract

The invention discloses a reverse serial connection control system and method for three direct-current motors. Eight IGBT modules of a four-phase inverter are connected in series two by two to form four bridge arms which are connected with the positive electrode and the negative electrode of a direct-current power supply in parallel; the three direct-current motors in reverse serial connection areconnected with the four bridge arms in series; the three direct-current motors pass through a speed sensor, a current sensor and a speed adjustment module in sequence and then are connected with a reference voltage synthesizer through a two-stage PI controller separately; the reference voltage synthesizer is connected with the four-phase inverter through a PWM pulse generation unit; the four-phase inverter is connected with the reference voltage synthesizer through a current adjusting module and a first-stage PI controller separately, and is connected to the PWM pulse generation unit throughthe reference voltage synthesizer; and pulse control signals generated by the PWM pulse generation unit are used for controlling on-off of the eight IGBT modules to drive the three current-current motors to run. By virtue of the reverse serial connection control system and method, four-quadrant operation of the three motors can be realized, the running direction and the operation speed of the motors can be changed, the energy of a motor feedback system can be sent back to the power grid, and the energy consumption is lowered.

Description

Technical field [0001] The invention belongs to the technical field of motor control, and specifically relates to a reverse series control system and method for three DC motors. Background technique [0002] Motor speed control technology is widely used in the field of automation control. With the acceleration of modernization, people's living standards are constantly improving, so that the demand and standards for automation are also constantly improving, which makes the application field of DC motor control further Increase. For example, military and aerospace radar wireless, inertial navigation, satellite attitude, spacecraft photocell tracking of the sun and other controls; industrial special processing equipment, CNC machine tools, intelligent robots; computer peripherals and various disk drives in office equipment , Control of various CD-ROM drives, plotters, scanners, copiers and other equipment. The development of motor control technology is due to the latest developmen...

AI Technical Summary

Problems solved by technology

At this time, in the existing control technology, if multiple motors are to be controlled, the single-quadrant operation can only work in the electric state, which consumes a large amount of energy, and cannot convert energy during the operation process. The circuit and control circuit will increase the cost, which is a problem that needs to be considered

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