Negative power supply switching circuit of solar power supply
A switching circuit and negative power supply technology, which is applied in the direction of battery disconnection circuit, electronic switch, load supply circuit, etc., can solve the problems of large energy loss, short working life, low reliability, etc., and achieve long working life and low driving energy loss Low power consumption and enhanced safety effects
Pending Publication Date: 2019-04-02
HUBEI UNIV OF TECH
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to solve the technical problems of low reliability, large energy loss and short working life of the existing electromagnetic relay as a switching element. The present invention provides a negative power switch circuit of a solar power supply, which is different from the previous Compared with the switch of the negative power supply of the solar power supply, the electromagnetic relay has high reliability, low energy loss and long working life
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[0015] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the examples. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0016] Such as figure 1 It is a negative power switch circuit of a solar power supply of the present invention. The circuit of the present invention is connected to a circuit in which the positive power supply DC1 and the negative power supply DC2 supply power to the load 1 and the load 2 respectively. The positive power supply DC1 is 12V, and the negative power supply DC2 is -12V. The circuit of the present invention includes: four resistors R1, R2, R3, R4, an NPN transistor Q1, a PNP transistor Q2, an N-channel metal oxide semiconductor field effect transistor (MOSFET) Q3, and th...
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The invention belongs to the technical field of power electronics, and specifically relates to a negative power supply switching circuit of a solar power supply. The circuit comprises four resistors R1, R2, R3, R4, an NPN-type triode Q1, a PNP-type triode Q2, an MOSFET (Metal Oxide Semiconductor Field Effect Transistor) Q3, a parasitic diode D of the MOSFET Q3, a positive voltage power supply DC1,a negative voltage power supply DC2 and a control signal terminal. The circuit is enabled to serve as a negative power supply switch of the solar power supply. When the switch needs to be on, a control signal A is changed into the high level, and the MOSFET Q3 is turned on; and when the switch needs to be off, the control signal A is changed into the low level, and the MOSFET Q3 is turned off. Compared with an electromagnetic relay serving as a switch of the solar negative voltage power supply in the past, the negative power supply switching circuit has the advantages of high reliability, lowenergy loss and long working life.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a negative power switch circuit of a solar power supply. Background technique [0002] In precision instrument circuits, positive and negative dual power supplies are often required. In the positive and negative dual power supply system of solar photovoltaic power generation, in order to protect the battery from over-discharge, it is necessary to effectively control the opening and closing of the negative power supply of the solar power supply, so it is necessary to design a high reliability, low energy loss and working Switching circuit for negative power supply with long life. [0003] The traditional method is to use the electromagnetic relay as the switching element, but the electromagnetic relay has contact action during the working process, there is mechanical loss, and the working life is short, and the electromagnetic relay achieves the opening and ...
Claims
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IPC IPC(8): H03K17/567H02J7/00
CPCH03K17/567H02J7/0031H02J7/0063
Inventor 王超吴铁洲谢建武吴媛严哲李拥军路成东黄柱越
Owner HUBEI UNIV OF TECH