YTPQC-AHF Active Harmonic Filters
YTPQC-AHF Active Harmonic Filters(AHF) provide a solution for real-time cancellation of harmonic distortions created by non-linear loads to ensure compliance with IEEE 519, G5/4, EN 50160 and also other power quality standards and recommendations. YTPQC Active Harmonic Filters are a versatile solution, easily tailored to deliver power factor improvement, voltage variation control, flicker mitigation and load balancing functionality.
The PWM INVERTER technology is the basic building block of an Active Harmonic Filter AHF are new generation harmonic filters which use modern technologies and devices to provide revolutionary filtering solution.
Essentially, they are wide spectrum harmonic current sources capable of generating a large range of harmonic currents and use very high speed switching devices like IGBTs ensuring response time of a few milliseconds. They produce counter harmonic currents in phase opposition to that produced by non linear loads, and these generated currents are injected into the system in real time ensuring effective cancellation of all harmonics present in the network.
In addition to canceling the harmonic current, Active Harmonic Filter are capable of improving the power factor by providing both capacitive and inductive reactive power in a step less manner. Presently, AHF are the most technologically advanced solutions available for harmonic filtering.
Patent: Speed-adjustable fan structure based on PWM control mode
The most widely used method for speed control of DC fans is PWM control, in which a PWM drive signal is applied to a field effect transistor connected to the high or low side of the fan to switch the fan on and off at a specific frequency. duty cycle to control fan speed. At present, PWM-controlled DC fans are generally difficult to clean. Since the fan blades of the fan are fixed with the motor, it is difficult for the staff to disassemble and clean the fan blades, and the dust accumulated on the fan blades can only be removed by brushes in the chassis. Sweeping, this will cause dust to splash around, which cannot achieve a good cleaning effect. At the same time, due to the limitation of the frame size, it takes a lot of time to clean up the dust, and the cleaning process is time-consuming and labor-intensive.
This YT Electirc utility model patent for Active Harmonic Filter and Static Var Generator relates to the technical field of speed-adjusting fans, and specifically discloses a speed-adjusting fan structure based on a PWM control mode, which includes an outer casing, a motor mounting seat, a fan blade mounting seat and a metal mesh cover. Drive motor, the back of the motor mounting seat is fixedly connected with four connecting rods in a circular equidistant circle with the center of the motor mounting seat as the origin. A connecting head is connected, a connecting sleeve is fixedly connected to the middle of the fan blade mounting seat, and the connecting sleeve is detachably and fixedly connected to the top of the connecting head. The fan blade is connected, and the metal mesh cover is detachably inserted on the front of the outer casing; the utility model facilitates the removal and cleaning of the fan blade mounting seat, and solves the problems of dust splashing and low efficiency during the cleaning process.
YTPQC-AHF Active Harmonic Filter can generate harmonics order from 2 to 50th. The cost of the active filter is much more than the passive filter but the complete eradication of the harmonics is possible using active filter.The active harmonic filter is also known as active harmonic conditioner.
100A/150A Active Harmonic Filter,100kVAr Static Var Generator
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