Variable frequency drive
STEP has been focusing on the fields of power electronics and motor control for over two decades. It boasts a fully integrated value chain—from independent R&D platforms and design to manufacturing, sales, and inspection—as well as a fully automated intelligent assembly line for integrated drive and control systems. STEP's high- and low-voltage variable-frequency drive platform covers the entire power range, with an annual production capacity of 500,000 units.
Relying on a multi-brand strategy encompassing"STEP","iAStar"and"SIGRINER",STEP continues to lead the markets for smart water management, HVAC systems, and logistics & warehousing drive-control systems. It has earned deep trust in the field of electrical control systems for open-mill and closed-mill rubber tire machinery, and is also widely applied in industries such as elevators, lifting equipment, marine and offshore engineering, mining, and general energy-saving applications.
AS530UL Liquid-Cooled Series Inverter
Voltage range: Three-phase, 380–460V; Power range: 110kW to 400kW; Refrigerant cooling: R123a, R513a, R1233zd(E); Operating environment: Adaptable to a wide temperature range from -20℃ to 55℃; no power derating required even in outdoor environments up to 46℃; Product certification: UL-certified, suitable for sale in markets including the U.S.; Installation method: Wall-mounted, on-board installation—compared to air-cooled inverters, the unit’s volume is reduced by 50%, and it supports both horizontal and vertical installation.
High protection rating IP54, with a 3C4-standard circuit board coating, suitable for high-humidity and high-dust environments. Comprehensive and reliable protection features, including detection of motor overcurrent, water shortage in the pump, rust prevention, and abnormal float switch conditions. Visual interface supporting multiple control modes: automatic, manual, emergency, one-in-use-one-in-standby, and dual-pump rotation.
AS570B Series Air-Cooled & Refrigerant-Plate Single-Unit Inverter
More reliable, more compact, and more flexible. The busbar capacitor is electrolyte-free, offering a longer service life and improved stability. It reduces the installation space required for circuit boards by 40%, and allows you to select the optimal algorithm based on different motor types and application scenarios.
AS570 Light Commercial Multi-Split Air Conditioner Dedicated Inverter
Applicable whole-machine models: Heating units (coal-to-electric conversion), fan heaters, hot water units, water heaters, pool units, dryers, packaged units, multi-split systems, and more.
PD110/PD210 High-Protective Inverter for Pump Applications
High protection rating IP55, 3C4-standard circuit board coating for enhanced resistance to high humidity, high dust levels, corrosion, and other harsh environmental conditions. Comprehensive and reliable protection features detect and safeguard against motor overload, water shortage, stall, and phase failure.
AS530UL Liquid-Cooled Series Inverter
Voltage range: Three-phase, 380–460V; Power range: 110kW to 400kW; Refrigerant cooling: R123a, R513a, R1233zd(E); Operating environment: Adaptable to a wide temperature range from -20℃ to 55℃; no power derating required even in outdoor environments up to 46℃; Product certification: UL-certified, suitable for sale in markets including the U.S.; Installation method: Wall-mounted, on-board installation—compared to air-cooled inverters, the unit’s volume is reduced by 50%, and it supports both horizontal and vertical installation.
High protection rating IP54, with a 3C4-standard circuit board coating, suitable for high-humidity and high-dust environments. Comprehensive and reliable protection features, including detection of motor overcurrent, water shortage in the pump, rust prevention, and abnormal float switch conditions. Visual interface supporting multiple control modes: automatic, manual, emergency, one-in-use-one-in-standby, and dual-pump rotation.
AS570B Series Air-Cooled & Refrigerant-Plate Single-Unit Inverter
More reliable, more compact, and more flexible. The busbar capacitor is electrolyte-free, offering a longer service life and improved stability. It reduces the installation space required for circuit boards by 40%, and allows you to select the optimal algorithm based on different motor types and application scenarios.
AS570 Light Commercial Multi-Split Air Conditioner Dedicated Inverter
Applicable whole-machine models: Heating units (coal-to-electric conversion), fan heaters, hot water units, water heaters, pool units, dryers, packaged units, multi-split systems, and more.
PD110/PD210 High-Protective Inverter for Pump Applications
High protection rating IP55, 3C4-standard circuit board coating for enhanced resistance to high humidity, high dust levels, corrosion, and other harsh environmental conditions. Comprehensive and reliable protection features detect and safeguard against motor overload, water shortage, stall, and phase failure.
Full product line of variable frequency drives
Low-voltage general-purpose frequency converter
High-voltage frequency converter
Large-drive frequency converter