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Whether The IGBT Rectifier Can Operate In A Magnetic Field
Aug 28, 2017

Whether the IGBT Rectifier can operate in a magnetic field
     Universal IGBT Rectifier is an auto-switching element with isolation function, widely used in remote control, telemetry, communication, automatic control, electromechanical integration and power electronic equipment, is one of the most important control components.
IGBT Rectifier
General IGBT Rectifiers generally have a sensing mechanism (input section) that can reflect a certain input variable (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.) (Output section) between the input section and the output section of the IGBT Rectifier, and an intermediate mechanism (driving section) for coupling the input amount, the function processing and driving the output section.
Is the IGBT Rectifier working in a magnetic field?
For electromagnetic interference or radio frequency interference is more sensitive around the device, it is best not to use AC excitation IGBT Rectifier. Selection of DC IGBT Rectifier to use with coil transient suppression circuit products. Those with solid-state devices or circuits to provide incentives and peak signal comparison Sensitive place, but also choose to have a transient suppression circuit products.
IGBT Rectifier according to the type of load power can be divided into AC and DC type. According to the switch type can be divided into normally open and normally closed type. According to the isolation type can be divided into mixed type, transformer isolation type and photoelectric isolation type, with photoelectric isolation type is the most.
General IGBT Rectifiers generally have a sensing mechanism (input section) that can reflect a certain input variable (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.) (Output section) between the input section and the output section of the IGBT Rectifier, and an intermediate mechanism (driving section) for coupling the input amount, the function processing and driving the output section.
IGBT Rectifier according to the use of occasions can be divided into two types of AC and DC, which are in the AC or DC power supply load switch, can not mix below the AC IGBT Rectifier as an example to illustrate its working principle, Figure 1 is (A and B) and the two output terminals (C and D) are the two main components (C and D), which are the main components of the AC rectifier. A four-terminal device. Work as long as the A, B with a certain control signal, you can control the C, D between the ends of the "pass" and "off" to achieve "switch" function, in which the coupling circuit function is A, The B-side input control signal provides a channel between the input / output terminals, but electrically disconnects the (electrical) connection between the input and output terminals of the IGBT Rectifier to prevent the output from affecting the input, coupling Circuit components are "optocouplers", it is sensitive, high response speed, input / output insulation (voltage) between the high level; because the input load is light-emitting diodes, which makes the IGBT Rectifier input is easy Do match with the input signal level, in use can be directly connected with the computer output interface, that is, "1" and "0" logic level control. Trigger circuit function is to produce the desired trigger signal, drive switch circuit ④ work, but because the switch circuit without special control circuit, will produce radio frequency interference and high harmonics or spikes pollute the grid, this special "Zero-crossing control circuit". The so-called "zero crossing" means that when the control signal is added and the AC voltage is zero, the IGBT Rectifier is on-state. When the control signal is turned off, the IGBT Rectifier waits for the intersection of the positive half and negative half of the alternating current (zero Potential), the IGBT Rectifier is off. This design can prevent high-order harmonic interference and pollution of the grid. The absorption circuit is designed to prevent the occurrence of spikes and surges (voltages) from the power supply on the impact and interference (or even malfunction) of the triacs of the switching devices. Generally, the "RC" series absorber circuit Linear resistance (varistor).