Controller of double-voltage output alternating-current generator for motorcar
A technology for generators and automobiles, applied in the direction of controlling generators through magnetic field changes, can solve the problems of increasing the cost of product transformation of auto parts suppliers, and achieve the effect of small pulsation coefficient
Active Publication Date: 2010-03-03
史立伟
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Problems solved by technology
But the 42V single-voltage power supply system involves a wide range of product technical transformation, which will inevitably increase the product transformation cost of auto parts suppliers.
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[0017] In the embodiment: R1, R2, R3, R4, R5, R6, R7, R8 are resistors; D1, D2, D3, D4, D5, D6 are high-power rectifier tubes; D7 is a low-power diode; T1 is a Darlington T2, T3, T4 are triodes; C1, C2 are electrolytic capacitors; S1 is a power tube, which can be a turn-off thyristor, a power transistor, a field effect tube or an insulated gate bipolar transistor; Dw1, Dw2 Is the Zener diode; F is the excitation winding; JF1, JF2, JF3 are the three-phase armature windings of the alternator.
[0018] The present invention will be further described below in conjunction with accompanying drawing:
[0019] figure 1 Provide a car alternator controller that can provide 42V and 14V power at the same time. The 42V voltage positive output terminal is at the upper right of the figure, the 14V voltage positive output terminal is at the upper left of the figure, and the negative poles of both are grounded. The first phase winding JF1, the second phase winding JF2 and the third phase win...
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The invention provides a controller of an alternating-current generator for a motorcar, which can simultaneously provide a high voltage (42V) and a low voltage (14V) power sources. The controller comprises a rectification circuit (1), a high voltage (42V) division circuit (2), a high voltage (42V) comparison circuit (3), an excitation circuit (4), a low voltage (14V) division circuit (5), a low voltage (14V) comparison circuit (6) and a low voltage (14V) trigger circuit (7). The controller is characterized in that voltage obtained by division by a second resistor (R2) in the high voltage (42V)division circuit (2) is compared with a reference voltage by the high voltage (42V) comparison circuit (3) so as to control the excitation circuit (4) to be opened or closed, namely that 42 V directcurrent is guaranteed to be outputted by controlling the level of exciting current; voltage obtained by division by a seventh resistor (R7) of the low voltage (14V) division circuit (5) is compared with the reference voltage by the low voltage (14V) comparison circuit (6), and the low voltage (14V) trigger circuit (7) is utilized for controlling the opening and the closing of a low voltage (14V) output end so that the outputted average voltage can be stabilized on 14V; and the low voltage (14V) output end of the motor is led out from the neutral point O of an exciting winding, and the voltageof the neutral point and the pulse coefficient of the outputted 14V voltage are low. The controller can simultaneously output the high voltage (42V) and the low voltage (14V) power sources, and has stable voltage and low cost.
Description
technical field [0001] The invention relates to a generator capable of simultaneously providing high-voltage (42V) and low-voltage (14V) voltages and a control circuit thereof, belonging to the technical field of automobile electric appliances. Background technique [0002] With the increasing demand for power generation of car generators by car electrical equipment, car designers put forward the idea of increasing car power supply voltage to increase car power supply, which has been unanimously recognized by car researchers and car manufacturers, and The relevant standards for the 42V voltage of automobile power supply have been formulated. But the 42V single-voltage power supply system involves too wide a range of product technical transformation, which will inevitably increase the product transformation cost of auto parts suppliers. Therefore, as a transitional 42V / 14V dual-voltage system solution, more and more people are paying attention. The invention provides an a...
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Inventor 史立伟张学义
Owner 史立伟