Steering controller of high-power direct-current motor

Abstract

The invention relates to a steering controller of a high-power direct-current motor, which is composed of an input control module and a power output control module. The input control module comprises a forward input control circuit and a reverse input control circuit. The power output control module is that four power MOS (Metal Oxide Semiconductor) transistors are connected in parallel to form an H-bridge control circuit. The forward input control circuit comprises two circuits. The reverse input control circuit also comprises two circuits. Each circuit comprises a DC-DC (Direct-Current-Direct-Current) power module, a delay circuit, a photoelectric isolation circuit and a driving circuit. Two circuits of voltage signals output by the forward input control circuit are respectively transmitted to a power MOS transistor 1 and a power MOS transistor 3. Two circuits of voltage signals output by the reverse input control circuit are respectively transmitted to a power MOS transistor 2 and a power MOS transistor 4. By utilizing the modularization circuit design and a two-layer installation structure, the load capacity of the steering controller disclosed by the invention is up to 48 VDC / 120A. The steering controller is applied to the steering control of the high-power direct-current motor in a high-reliability occasion. The steering controller has the characteristics of being rapid in action speed, strong in current impact resistance capacity, steady for working and the like.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a high-power DC motor steering controller. Background technique [0002] At present, a logic circuit composed of a mechanical switch or an application-specific integrated circuit is generally used to control the motor. Due to short life, low reliability, poor ability to withstand harsh environments, and high failure rate, mechanical switches are difficult to apply to high-reliability fields. In order to meet the needs of DC motor control and steering, semiconductor manufacturers have introduced ASICs, which can be combined with computers to form a DC motor control system. However, the output power of DC motor drivers composed of ASICs is limited, which is not suitable for high-power DC motor drive control. Contents of the invention [0003] The technical problem solved by the present invention is to design a high-power DC motor steering solid controller, whic...

AI Technical Summary

Problems solved by technology

Mechanical switches are difficult to apply to high reliability fields due to their short life, low reliability, poor resistance to harsh environments, and high failure rate.

In order to meet the needs of DC motor control and steering, the application-specific integrated circuits introduced by semiconductor manufacturers can be combined with computers to form a DC motor control system, but the output power of the DC motor driver composed of ASICs is limited, and it is not suitable for high-power DC motor drive control.

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