Voltage zero-crossing switching control device supporting multiple paths of switches
A multi-way switch and control device technology, applied in circuit devices, program control, computer control and other directions, can solve the problems of increasing system design complexity and hardware cost, and achieve simple structure, reduce hardware cost, and connect inrush current. small effect
Inactive Publication Date: 2015-11-25
QINGDAO HAIER INTELLIGENT HOME TECH CO LTD
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Problems solved by technology
[0004] The existing circuit design for controlling the zero-crossing switching of the switching switch can only control the switching of a single switching switch, so it can only control one load to start when the voltage of the AC power supply is zero-crossing.
For a multi-load system, it is necessary to configure a voltage zero-crossing switching device for each load to control the voltage zero-crossing switching of the load, which increases the complexity of the system design. , hardware cost increases
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[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] The voltage zero-crossing switching control device of this embodiment, in order to realize the support for multi-channel switching switch switching control, is mainly provided with a voltage zero-crossing detection circuit, a controller, and an N-way switching switch K1 in the design of the system circuit. , K2 and N-way electronically controlled switches S1, S2, etc., see figure 1 As shown, the N is a positive integer greater than 1. Wherein, the voltage zero-crossing detection circuit is connected to the AC power supply for providing AC power supply for different loads Load1 and Load2, detects the zero-crossing moment of the voltage of the AC power supply, and generates a pulse signal to be output to the controller for generating the input voltage. Cut command to realize the switching control of the switching s...
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The invention discloses a voltage zero-crossing switching control device supporting multiple paths of switches, and includes a voltage zero-crossing detection circuit, a controller, N paths of switching switches and N paths of electric control switches connected in series with the N paths of switching switches in one-to-one correspondence, wherein the voltage zero-crossing detection circuit performs zero-crossing detection on accessed alternating voltage and outputs a pulse signal to the controller. The control first controls one of the path of electric control switch to be switched off according to user operation, so that the voltage zero-crossing detection circuit is connected with an alternating current power supply, and then controls the switching switch connected with the electric control switch in series to be switched off in an alternating voltage zero-crossing period according to the received pulse signal, thereby controlling a path of load to be powered on to operate. The voltage zero-crossing switching control device provided by the invention can realize switching control of multiple paths of switching switches at voltage zero-crossing moments, and multiple paths of loads can be controlled to be powered on and started independently at different voltage zero-crossing moments only by use of one path of voltage zero-crossing switching control device, thereby greatly simplifying system design, and reducing hardware cost.
Description
technical field [0001] The invention belongs to the technical field of switch control, and in particular relates to a control device for controlling accurate switching of a switching switch when the AC voltage crosses zero. Background technique [0002] At present, in many power systems that use AC power supply, a large number of capacitors or inductance components are often used in the system circuit design. When the system is put into power supply, if the input AC voltage is large, it will be more affected. large current shock. In order to reduce the inrush current of capacitors and inductance components when the system circuit is powered on, it is necessary to accurately control the moment when the system circuit is powered on, so that it can be connected to the AC power supply when the AC voltage crosses zero, so as to reduce the impact of the power supply on the system circuit. shock. [0003] In order to control the system circuit to connect to the external AC power ...
Claims
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IPC IPC(8): H02J3/00G05B19/042
Inventor 徐志方徐露
Owner QINGDAO HAIER INTELLIGENT HOME TECH CO LTD