Soft starting circuit and anti-impact control method for main loop
A technology of soft start circuit and main circuit, which is applied in the direction of circuits, relays, electrical components, etc., can solve the problems of damaged capacitors and capacitor shocks, and achieve the effects of prolonging service life, protecting internal contacts, and avoiding instantaneous high current shocks
Inactive Publication Date: 2012-10-03
张家港市泓溢电源科技有限公司
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005]The problem solved by the present invention is that the existing soft start circuit is easy to cause impact on the capacitance of the main circuit and damage the capacitance
Method used
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Embodiment Construction
[0019] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0020] see figure 2 and image 3 The soft start circuit of the present invention includes an AC power supply with an AC transformer 1, an AC contactor 2, a rectifier circuit 3, a load 5 and a power supply for supplying power to the AC contactor 2, and is used to control the main circuit in the power supply equipment. The AC power supply is used to provide electric energy to the main circuit. The AC power supply is a three-phase AC power supply. The AC contactor 2 includes three pairs of static contacts ( 21A, 21B), three main contacts 22 , contact ends of normally closed contacts ( 23A, 23B) and normally closed contacts 24 . Each pair of static contacts (21A, 21B) is respectively connected to the AC power supply and the rectificat...
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Abstract
The invention discloses a soft starting circuit and an anti-impact control method for a main loop. The soft starting circuit comprises an alternating current power supply, an alternating current contactor, a rectification circuit and a load. The alternating current contactor comprises fixed contact terminals, main contact terminals separated from or contacting the fixed contacts, normally closed contact terminal contact ends and a normally closed contact terminal contacting or separated from the normally closed contact terminal contact ends, wherein each pair of fixed contact terminals is connected with the alternating current power supply and the rectification circuit respectively. The rectification circuit converts alternating current into direct current. Each pair of normally closed contact terminal contact ends is connected with the alternating current power supply and the rectification circuit respectively. In the normal state of the alternating current contactor, the alternating current power supply contacts the normally closed contact terminal contact ends through the load and the normally closed contact terminal to input current to the rectification circuit. In the turn-on state of the alternating current contactor, the normally closed contact terminal is separated from the normally closed contact terminal contact ends, the load is short-circuited by the main contact terminals, and the alternating current power supply contacts the fixed contact terminals through the main contact terminals to input the current to the rectification circuit. The impact of high transient current during the starting of the main loop can be avoided, and the inner contact terminals of the alternating current contactor and devices of the main loop can be protected.
Description
[0001] technical field [0002] The invention relates to a soft start circuit, in particular to a soft start circuit based on an AC contactor, and also to an anti-impact control method of a main circuit based on an AC contactor. Background technique [0003] see figure 1 , an existing soft start circuit includes an AC power supply 1, an AC contactor 2 and a rectifier circuit 3, which are used to control the main circuit in the power supply equipment. The AC contactor 2 is used as a switch, including three pairs of static contacts ( 21A, 21B), three main contacts 22 , a pair of normally closed contact terminals ( 23A, 23B) and a normally closed contact 24 . Each pair of static contacts 21A and 21B is respectively connected to the AC power source 1 and the rectification circuit 3 so that the AC contactor 2 is connected to the AC power source 1 and the rectification circuit 3 . Each pair of static contacts ( 21A, 21B) is connected to one main contact 22 when the AC contactor ...
Claims
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Inventor 朱磊
Owner 张家港市泓溢电源科技有限公司