Drive unit of starting motor

Abstract

The invention provides a drive device of a starting motor, which comprises a first coil (1), a second coil (2), a contact switch (4) and a power supply (6), wherein a positive electrode of the power supply (6) is connected with the first coil (1) and the second coil (2) and is grounded through the second coil (2). The drive device also comprises a voltage transformer (5) and a one-way conductive element (3), wherein the output end of the voltage transformer (5) is connected with one end of the contact switch (4); the other end of the contact switch (4) is connected with the starting motor; thepositive electrode of the power supply (6) is connected with the positive electrode of the one-way conductive element (3) through the first coil (1); the negative electrode of the one-way conductiveelement (3) is connected with the other end of the contact switch (4); and the one-way conductive element (3) only allows the current from the positive electrode to the negative electrode to pass through. By adopting the drive device of the starting motor, stable voltage can be supplied to the starting motor so that the starting motor can start an engine stably.

Description

technical field [0001] The invention relates to a drive device, in particular to a starter motor drive device for a starter motor of a hybrid electric vehicle. Background technique [0002] At present, due to people's increasing emphasis on environmental protection and effective and rational use of energy, hybrid vehicles with high-efficiency, energy-saving and environmentally friendly models have become the development trend of the automotive industry. [0003] The power system of existing hybrid electric vehicle is made up of basic power modules such as engine, starter motor, accumulator, with the single accumulator of rated voltage being 12V as power supply device to drive starter motor, and then start engine. [0004] Since the starting voltage required to drive the starter motor is provided by a single battery, the battery has a heavy load and a short life. And because the internal resistance of the battery tends to change greatly with changes in the ambient temperatur...

AI Technical Summary

Problems solved by technology

[0004] Since the starting voltage required to drive the starter motor is provided by a single battery, the battery has a heavy load and a short life

And because the internal resistance of the battery tends to change greatly with changes in the surrounding temperature and use environment, the voltage applied to the starter motor also changes greatly

The changing starting voltage impairs the starting stability of the starter motor, which also affects the starting stability of the engine

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