A kind of relay control method
A relay control and relay technology, applied in relays, circuits, electrical components, etc., can solve problems such as power supply voltage deviation, excessive starting current, high-voltage transformer deviation, etc., to reduce damage, reduce impact, improve service life and use safety effect
Active Publication Date: 2018-01-12
WHIRLPOOL CHINA
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Problems solved by technology
[0004] The present invention provides a relay control method to solve the problem of excessive starting current caused by the deviation of the relay itself, the deviation of the power supply voltage, the deviation of the high-voltage transformer, or the deviation of the magnetron in the prior art. The specific technical solution is as follows:
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[0019] Such as figure 1 , figure 2 A relay control method is shown. The signal detection circuit samples from the strong current, and transmits the real-time sampling results to the main chip for processing. The main chip determines whether the frequency of the current voltage environment is 50Hz, 60Hz or other special circumstances. In this way, the highest voltage moment of the strong power supply environment is judged, and then a control signal is given to the control circuit according to the average value of the relay pull-in delay time preset by the factory, and the action delay of the relay in this environment is detected while the control circuit is controlling. Time, the main chip readjusts the pull-in delay time of the microwave oven under the power usage environment by comparing the time with the preset time, and memorizes this time, and executes according to the new value when the next execution is started, At the same time, use the new value to compare, and so on...
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The invention relates to a relay control technology, and specifically relates to a relay control method. The relay control method comprises the following steps: a signal detection circuit performing sampling from heavy currents for transmitting to a main chip; the main chip, according to the frequency of a current sampling result, determining highest voltage time of a power supply environment; the master chip, through combination with the highest voltage time and a preset relay suction delay time average value, giving a control signal to a control circuit; the control circuit controlling motion of a relay, detecting motion delay time of the relay in the environment while performing control and returning the motion delay time; and the main chip, through the returned motion delay time, re-determining a new suction delay time average value and taking the average value as a preset value of a next cycle. According to the invention, damage caused by the heavy currents to the contact of the relay during suction of the relay can be well reduced, the impact caused by the heavy currents to a power line during startup is greatly reduced, the service life of a microwave oven is further prolonged, and the application safety of the microwave oven is further improved.
Description
technical field [0001] The invention relates to relay control technology, in particular to a relay control method. Background technique [0002] Relay (English name: relay) is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. Applied to automatic control circuits, it is actually an "automatic switch" that uses small currents to control large current operations, so it plays the role of automatic adjustment, safety protection, and conversion circuits in the circuit. [0003] In circuit science, when the load is energized, a large current is usually generated, which is the inrush current. When using a relay to control the microwave function of a microwave oven, due to the deviation of the relay itself, the deviation of the power supply voltage, the deviation of the ...
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IPC IPC(8): H01H47/02
CPCH01H47/02
Inventor 杨文军童怀俊陈绍一
Owner WHIRLPOOL CHINA