Graphitization Furnace Harmonic Interference"&": Why Are Your Precision Instruments Always Malfunctioning?
Has your precision instrument been malfunctioning inexplicably lately? Data jumping around, sensors failing, even control system errors? You've checked the software and the wiring, but t"&"he problem persists? I've seen this many times, and the problem often comes from that big machine in the workshop—the graphitization furnace.
Where do the harmonics come from?
Harmonics are primarily generated by th"&"e power regulation method of SCR power supplies. Traditional SCR power supplies regulate power through phase-shift control, which inevitably injects harmonics into the power grid. These harmonic currents circulate within the grid, causing real harm: Incr"&"eased line losses and reactive power, leading to increased electricity costs. Causing grid voltage distortion, causing malfunctions or even damage to precision instruments. Affecting the normal operation of other equipment on the same power supply line."&" Solution 1: IGBT Power Supply (Recommended) IGBT power supplies use PWM control technology, achieving a power factor of over 0.95. They generate minimal harmonics, causing virtually no pollution to the power grid. This is a one-time solution, requirin"&"g no additional harmonic mitigation equipment, does not increase floor space, and is easy to maintain.
Eradicative Solution Two: SCR + APF Harmonic Mitigation Device
If an SCR power supply is indeed necessary, "&"an Active Power Filter (APF) can be specially configured based on the equipment power and the on-site power grid conditions. However, this will increase additional procurement costs, and the APF itself also requires space.
The Ultimate Recommendation for Protecting Precision Instruments
Of course, the most important measure is: to physically isolate the power "&"supply circuit of the graphitization furnace from the precision instruments, control systems, and precision sensors in the workshop. Ideally, they should be powered by different transformers and run on different power buses. No matter how much money you s"&"pend on filters, it's not as effective as completely separating the pollution source from the victims.
