AC, DC & Filter Reactor Manufacturer for Industrial Applications
DOREXS manufactures electrical reactors for VFDs, motor drives, power electronics, industrial automation, power conversion and power quality applications.
Our reactor range includes AC input reactors, AC output reactors, DC reactors, DC smoothing reactors, filter reactors, current limiting reactors, high-frequency reactors and series reactors.
Founded in 2008 | Standard + Custom Reactors | Engineering Support | OEM & ODM Service
Electrical Reactor Product Categories
Different electrical systems require different reactor structures and electrical characteristics.
DOREXS provides multiple reactor types for VFD systems, power converters, motor drives, industrial equipment and power quality applications.
DOREXS provides multiple reactor types for VFD systems, power converters, motor drives, industrial equipment and power quality applications.
Filter Reactors
Filter reactors are used as inductive elements in harmonic filtering and power quality circuits.
Depending on the circuit topology, they may work together with capacitors or other components to control harmonic currents and improve the electrical behavior of the power system.
Filter reactor design must be matched carefully to system voltage, current, frequency, inductance and the intended filtering function.
AC Input Reactors
AC input reactors, also called line reactors, are installed between the AC power supply and the input of a VFD, inverter or other power converter.
By adding impedance to the input circuit, an AC input reactor can help reduce current peaks, mitigate input current harmonics and provide additional protection against certain power-line disturbances.
AC Output Reactors
AC output reactors are installed between the output of a VFD or inverter and the motor.
They add inductance to the motor circuit and can help reduce PWM-related voltage stress, current ripple and high-frequency disturbances reaching the motor.
Output reactors may be useful where motor cable conditions, switching characteristics or motor insulation requirements make additional output impedance desirable.
High-Frequency Reactors
High-frequency reactors are inductive power components designed for circuits operating above conventional 50/60Hz power frequency.
They may be used in switching converters, inverters and other high-frequency power electronic circuits for functions such as current smoothing, energy storage, ripple control or harmonic management.
The required magnetic core, winding structure, inductance and thermal design depend strongly on switching frequency and operating conditions.
Current Limiting Reactors
Current limiting reactors introduce additional inductive impedance into an electrical circuit to restrict rapid increases in current.
They may be used where control of inrush current, fault current or transient current is required.
The correct reactor must be selected according to system voltage, rated current, required inductance and the electrical characteristics of the application.
DC Reactors
DC reactors are inductive components installed in DC circuits or the DC link of power electronic equipment.
They are commonly used to smooth current, reduce ripple and limit rapid current changes in rectifiers, converters, VFDs and other power electronic systems.
DOREXS provides standard and customized DC reactor solutions for different current and system requirements.
Series / Detuned Reactors
Series reactors can be connected in series with capacitor banks in reactive power compensation systems.
An appropriately selected reactor helps shift the resonant frequency of the capacitor circuit and can reduce the risk of harmonic amplification and excessive harmonic current flowing through the capacitors.
The required reactance rate should be selected according to the harmonic environment and system design.
Featured DOREXS Reactor Series
DOREXS currently provides a range of standard reactor series covering DC smoothing, VFD applications, harmonic filtering, current limiting and reactive power compensation.
Series |
Reactor Type |
Main Application |
| DCSR | DC Smoothing Reactor | DC ripple reduction and current smoothing |
| DCR | DC Reactor | DC links, converters and industrial DC systems |
| CLR | Current Limiting Reactor | Current limitation and electrical protection |
| HFR | High-Frequency Reactor | High-frequency power conversion |
| TPIR | Three-Phase AC Input Reactor | VFD and inverter AC input |
| TPFR | Three-Phase Filter Reactor | Harmonic and power quality circuits |
| DSR | Series / Detuned Reactor | Capacitor reactive power compensation |
| ACL | Three-Phase AC Reactor | Input or output reactor applications |
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Reactor Manufacturing & Customization Capabilities
Selecting a reactor is not simply a matter of choosing a current rating.
The reactor must be matched to the electrical system, converter topology, switching characteristics, load and operating environment.
DOREXS can evaluate standard and custom reactor configurations according to the main project requirements.
Design Requirement
Typical Considerations
Reactor Type
AC input / AC output / DC / smoothing / filter / current limiting / high-frequency / series
Phase
Single-phase / Three-phase depending on application