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introduction：Principle of frequency converter， ???The principle of frequency converter is to use the on-off action of power semiconductor devices to convert the power frequency power supply into another frequency power control device。Divisible intersection——Ac frequency converter，Hand in——straight——Ac frequency converter。Hand in——Ac inverter can be direct Turn alternating current into alternating current with variable frequency and voltage；Hand in——straight——Ac frequency converter is the first alternating current through the rectifier first rectified into direct current，Then through the inverter to turn this DC current into a frequency and voltage variable Alternating current。
2016-03-05 Reading quantity 1273
introduction：Frequency converter maintenance knowledge，Inverter working principle，Frequency converter is a power control device that converts the power frequency power supply to another frequency by using the on-off action of power semiconductor devices。The frequency converters we use now mainly use alternating—straight—Intersection mode，The power frequency AC power supply is converted into DC power supply by rectifier，then...
2016-03-05 Reading quantity 1112
introduction：Frequency converter action description
2016-03-29 Reading quantity 288
introduction：abbInverter working principle，And other inverter principle is basically the same，It is also a sub-rectifier unit—capacitance—-Inverter unit，merelyABBOne more feature is thatDTCDirect torque control；The first transfer，I dont know. Can I see it？See the diagram for details
2016-03-23 Reading quantity 364
introduction：Relay top ten brands list，Relay choose what brand is good
2016-03-21 Reading quantity 735
introduction：The role of inverter reactor in Fengye Mall，A reactor is installed at the input end of many frequency converters，On the one hand, it is to reduce harmonic current emission，On the other hand, it can improve the characteristics of the frequency converter against surge interference。
2016-03-16 Reading quantity 889
introduction：Inverter working principle and control mode
2016-03-09 Reading quantity 922
introduction：Frequency converter maintenance procedure，ABBInverter maintenance methods need to be mastered properly，Because the inverter is composed of a variety of components，The performance of some of these components will gradually decrease after long-term work、aging，This is the main cause of failure，In order to ensure the long-term normal operation of the equipment，Some vulnerable components should be replaced from time to time，E.g. Capacitance、Cooling fan。
2016-03-09 Reading quantity 959
introduction：Time relay wiring，Time relay is a very important component in the electrical control system。Generally divided into power delay and power delay two types。 From the principle of action there are electronic、Mechanical equivalence。Electronic is the use of capacitive charge and discharge and then with the principle of electronic components to achieve delay action。The mechanical style is more，Active air bag、Air bag type of spring.
2016-03-08 Reading quantity 848
introduction：Relay schematic diagram，It is a kind of electrical equipment，It is often used in automatic control circuits，It can control the turn-on and turn-off of large current with small current，Thus play the role of automatic control。below，Lets take a look at the relay wiring diagram first，Find out how it works。
2016-03-08 Reading quantity 1248
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