Energy-saving type starter control system with self-protection function

Abstract

The invention relates to the field of vehicle engineering and electrical equipment, and discloses an energy-saving type starter control system with a self-protection function. The energy-saving type starter control system with the self-protection function comprises a compound relay, a starting unit, a reset unit and a self-protection unit; the compound relay, the starting unit and the reset unit are in electrical connection, and the self-protection unit balances the starting unit and the reset unit through magnetic force. According to the technical scheme, a permanent magnet is adopted to replace an original holding coil to improve the technical scheme, the design that neutral points of an engine is matched with a return coil control device in a voltage matching mode is utilized, the energy consumption problem, in the prior art, of the holding coil is solved, a gear reducer device can be prevented from being additionally installed or the rated power and the boundary dimension of a starter can be prevented from being reduced, and the cost of the starter and a vehicle is saved; meanwhile, the system has the self-protection function and the function of preventing secondary starting and igniting caused by misoperation, and the service life of equipment such as the starter, a storage battery and flywheels is prolonged.

Description

technical field [0001] The invention belongs to the fields of vehicle engineering and electrical equipment, in particular to an energy-saving starter control system with self-protection function. Background technique [0002] At present, the commonly used starter control circuit systems for engineering locomotives (automobiles) include: switch direct control type, type with starter relay and type with composite relay, etc. [0003] The above background technology has the following defects: in the starting process of the switch direct control system, the key switch is easily damaged due to the fact that the current through the key switch and the electromagnetic switch coil is too large (generally more than 35A); [0004] The system with starting relay uses the starting relay contact to control the electromagnetic switch of the starter, which reduces the current passing through the key switch during starting and prolongs the service life of the key switch. Collision damage oc...

AI Technical Summary

Problems solved by technology

[0003] The above background technology has the following defects: in the starting process of the switch direct control system, the key switch is easily damaged due to the fact that the current through the key switch and the electromagnetic switch coil is too large (generally more than 35A);

[0004] The system with starting relay uses the starting relay contact to control the electromagnetic switch of the starter, which reduces the current passing through the key switch during starting and prolongs the service life of the key switch. Collision damage occurs between the gear and the flywheel ring gear;

[0005] The system with composite relays solves this problem well by introducing the neutral point voltage of the generator into the composite relay and adopting the composite switch control method, but lacks the self-protection function;

[0006] At the same time, the common defect of the above three methods is that the holding coil is used to maintain the movable iron core against the contact plate during the starting process, so that the DC motor can start and run. However, the holding coil and the DC motor are connected in parallel on the battery, and the resistance of the holding coil is very low Small, so that the battery circuit, which has a limited power supply capacity, must take a considerable part of the current to maintain the coil power supply, which reduces the starting electromagnetic torque of the starter and reduces the starting performance of the starter. The starting torque of the starter, and the addition of a gear reduction device, not only increases the cost of the vehicle, but also adds a source of failure

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