The WC1 is a low harmonic Active Front End (AFE) drive with an embedded sinewave filter, positioned as a solution for applications requiring harmonic mitigation and motor-friendly output in a compact, wall-mounted form.
The WC1 provides a low harmonic solution in a wall-mounted form, eliminating the need for external harmonic mitigation or motor protection filters. These filters are embedded within the drive, enabled by reduced component size from Silicon Carbide (SiC) high switching frequencies.
The WC1 also supports regenerative operation and does not require a dynamic braking resistor (DBR). A capacitive touchscreen interface is standard, and a mobile app is available for configuration.
Silicon carbide (SiC) is a wide band gap semiconductor material with a significantly larger energy band gap than conventional silicon. This property enables operation at higher switching frequencies, higher temperatures, and higher voltages.
SiC devices are widely used in demanding applications such as electric vehicles (EV), photovoltaic (PV) systems, and industrial power electronics, where efficiency, power density, and thermal performance are critical.
An Active Front End is a rectifier topology that reduces harmonic distortion and enables energy regeneration back to the power system.
The WC1 AFE integrates DC bus capacitors, switching devices, and LCL filtering.
An Active Front End (AFE) does not require a separate control board in the WC1. A single control board manages both input and output switching functions.
The WC1 uses film-type capacitors, which provide longer service life compared to electrolytic capacitors and do not require reconditioning after extended idle periods.
Unlike matrix converters, which use an AC-to-AC topology and do not include capacitors, the WC1 follows a conventional AC-DC-AC topology that incorporates DC bus capacitance.
The lead length considerations for the WC1 are that motor cable lengths can extend several thousand feet without concern for reflected wave effects, due to the embedded sinewave filter that converts the PWM waveform into a sinusoidal output and eliminates voltage spikes (dV/dt).
For extended distances, voltage drop becomes the primary consideration, and conductor sizing may need to be adjusted based on the total cable length.
Additional motor protection devices are not required. The embedded sinewave filter minimizes common mode voltage and eliminates dV/dt, lowering the risk of bearing fluting and insulation stress.
As a result, standard motors can be used without the need for inverter-duty ratings, shaft grounding devices, or specialized cabling.
IEEE 519-2022 is a system-level standard, not a product specification. Compliance depends on the overall electrical system and must be verified through harmonic analysis.
The WC1 achieves total harmonic current distortion (THDi) of less than 3 percent at full load, supporting system-level compliance in appropriate applications.
The WC1 is dual-rated and is available in both Normal Duty (ND) and Heavy Duty (HD) ratings, as indicated on the nameplate.
