Wiper motor speed regulation system with pulse-width modulation and voltage regulation

Abstract

The invention discloses a wiper motor speed regulation system with pulse-width modulation and voltage regulation, which comprises a signal processing module, an integrated controller and a motor driving control module. The wiper motor speed regulation system provided by the invention belongs to an integrated circuit modularization pulse-width modulation and voltage regulation (PMC) system, so a wiper motor only needs a pair of electric brushes, coils do not need phase shift voltage division, and the motor efficiency can reach the optimum no matter whether the speed is high or low. A contactless high-power field effect transistor (high-power metal oxide semiconductor (MOS) tube) is adopted for replacing a relay in the existing prior, the operation reliability of a motor is improved, simultaneously, and the interference generated when replay contacts are opened or closed can also be effectively avoided. In addition, an overcurrent detection circuit and relative overload protection programs are integrated on the signal processing module, the reliability of a motor protecting system is improved, and the service life of the wiper motor is prolonged. An electromagnetic magnetic compatibility (EMC) anti-interference circuit is integrated on the integrated controller, and the production cost of the wiper motor is effectively reduced.

Description

technical field [0001] The invention relates to a wiper motor speed regulation system, in particular to a wiper motor speed regulation system with pulse width modulation voltage regulation. Background technique [0002] At present, the speed regulation of the traditional wiper motor usually adopts the speed regulation mode of multiple pairs of brushes and armature winding component pressure phase shifting. When the armature is running at high speed, the efficiency of the wiper motor is also low due to the low utilization rate of the coil. ;At the same time, the opening of the traditional wiper motor and the selection of working modes (high and low speed gears) are achieved by indirectly controlling the relay to switch the working armature coil of the motor through the operation of the combination switch. This control method is complex in wiring and high in cost. It is easy to generate electromagnetic interference and affect the stability of the circuit; in addition, the trad...

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Problems solved by technology

[0002] At present, the speed regulation of the traditional wiper motor usually adopts the speed regulation mode of multiple pairs of brushes and armature winding component pressure phase shifting. When the armature is running at high speed, the efficiency of the wiper motor is also low due to the low utilization rate of the coil. ;At the same time, the opening of the traditional wiper motor and the selection of working modes (high and low speed gears) are achieved by indirectly controlling the relay to switch the working armature coil of the motor through the operation of the combination switch. This control method is complex in wiring and high in cost. It is easy to generate electromagnetic interference and affect the stability of the circuit; in addition, the traditional wiper motor uses a bimetal protector placed on the brush frame inside the motor, and the circuit is controlled by the heating and deformation of the bimetal; Built-in inductance, capacitance filter circuit to achieve anti-electromagnetic interference (EMC), poor reliability

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