Toshiba Inverters and AC Motor Drives

The Toshiba TOSVERT inverter family covers a wide range of motor-control applications, from compact machinery, fans and pumps to conveyors, lifting equipment, high-torque machinery and large industrial process systems.

Otomasyon AVM has published technical information and supplied Toshiba industrial-control products since 2013. This section includes both current Toshiba inverter families and important discontinued series that are still widely found in operating machinery.

Important: Not every Toshiba inverter shown on this website is still in production. Older series such as VF-S11, VF-PS1 and VF-nC1 remain important because many are still operating in industrial machines and continue to require manuals, fault-code information, replacement planning and technical support.

Current Toshiba Inverter Families

Toshiba VF-S15

The VF-S15 is Toshiba's multifunction compact inverter for a broad range of applications including machinery, fans, pumps, conveyors and lifting systems.

The series combines compact construction with sensorless vector control, energy-saving functions, built-in PID control, PM motor capability, braking functions, RS485 / Modbus RTU communication and programmable I/O.

The VF-S15 is also Toshiba's recommended successor to the discontinued VF-S11. When replacing an existing VF-S11, however, the conversion should not be based only on matching motor kW. Terminal assignments, analog-input configuration, communication, braking and parameter functions must also be compared.

Toshiba VF-nC3

The VF-nC3 is Toshiba's simple and compact inverter for smaller machines and general-purpose motor-speed control.

Depending on model and supply class, the series supports V/f control, automatic torque boost, sensorless vector control, energy-saving operation and built-in RS485 / Modbus RTU communication.

Its compact size and relatively simple commissioning make the VF-nC3 suitable for small machinery, conveyors, pumps, fans and other applications where a large high-performance inverter would be unnecessary.

EMC-filter configuration varies according to the exact voltage and model class, so the full drive model number should be checked rather than assuming that every VF-nC3 has identical hardware.

Toshiba VF-AS3 / VF-AS3J

The VF-AS3 and VF-AS3J represent Toshiba's higher-function inverter platform for applications requiring more advanced motor control, system integration and industrial networking than the compact VF-nC3 or VF-S15 families.

These drives are intended for demanding industrial systems where advanced diagnostics, network integration, high-performance motor control and system scalability are important.

Important Legacy Toshiba Inverter Families

Toshiba VF-S11

The VF-S11 is one of Toshiba's best-known discontinued compact inverter families. It was produced for many years and is still installed in a large number of machines.

The VF-S11 provides adjustable-speed motor control, sensorless vector control, PID, programmable VIA/VIB analog inputs, preset speeds, braking-resistor support and optional industrial communication interfaces.

Although the series is no longer manufactured, its parameter structure, terminal hardware, fault codes and replacement requirements remain highly relevant for maintenance personnel. Toshiba recommends VF-S15 as the successor family.

Toshiba VF-PS1

The VF-PS1 is a large-capacity Toshiba inverter family developed particularly for fan, pump and industrial process applications. High-power 400 V models extend up to approximately 630 kW.

VF-PS1 drives can still be found in pumping stations, HVAC systems, compressors and other large-motor installations even though the series has been discontinued.

When servicing a VF-PS1 installation, check the complete inverter model, motor data, PID configuration, communication options and actual load behaviour rather than treating it as a simple high-power VFD.

Toshiba VF-nC1

The VF-nC1 is an older compact Toshiba inverter series used in small machinery and general-purpose speed-control applications.

It covered applications ranging from simple speed control to low-speed constant-torque operation. The series has now been discontinued, with the newer VF-nC3 family representing Toshiba's later compact-drive generation.

When replacing a VF-nC1 with a newer inverter, do not assume that terminal assignments and parameter numbers are identical. Existing machine wiring and control logic should be reviewed before commissioning the replacement drive.

Toshiba VF-AS1

The VF-AS1 is another important legacy Toshiba high-performance inverter family. It was used in demanding machinery requiring strong low-speed torque, vector control and more advanced motor-control performance.

VF-AS1 drives can still be found in cranes, hoists, presses, compressors, crushers and other high-torque industrial machinery. For these installations, original manuals, fault-code information and parameter records remain valuable service resources.

Selecting a Toshiba Inverter

A VFD should never be selected by motor kW alone. Supply voltage, motor rated current, load type, required low-speed torque, acceleration and deceleration time, regenerative braking, analog-signal type, PLC communication and operating environment should all be considered.

For example, PID control and energy-saving functions may be the main requirements in fan and pump applications, while a crane or high-inertia machine may require much greater attention to braking energy, low-speed torque and acceleration/deceleration performance.

When replacing a discontinued Toshiba inverter with a newer series, do not copy parameter numbers directly from one drive to another. Compare the functions individually, including digital inputs, analog scaling, motor parameters, PID settings, braking functions and communication addresses.

Toshiba Fault Codes and User Manuals

Otomasyon AVM contains user manuals, communication documents and fault-code information for several Toshiba inverter generations. These resources are particularly valuable for discontinued drives such as VF-S11, VF-PS1, VF-AS1 and VF-nC1.

When a Toshiba inverter trips, the displayed code should be evaluated together with the operating condition at the time of the fault. Overcurrent during acceleration, overvoltage during deceleration, motor overload, phase loss and ground-fault conditions indicate very different problems.

Toshiba Servo Systems

Our Toshiba Servo Systems section contains technical information and documentation for Toshiba Machine BS Servo motors, servo amplifiers and related motion-control equipment.

The former Toshiba Machine business now operates under the Shibaura Machine name. For this reason, technical documents for older servo systems may appear under either Toshiba Machine or Shibaura Machine.

Toshiba technical pages:
+ Toshiba VF-S15
+ Toshiba VF-nC3
+ Toshiba VF-S11
+ Toshiba VF-PS1
+ Toshiba VF-nC1
+ Toshiba Servo Systems
+ AC Drive / VFD Main Page

• Toshiba inverter price list
• Toshiba Servo
• Toshiba VF-AS1

• Toshiba VFD Contact
• Toshiba VFD fault codes
• VF-nC1 toshiba ac drive

• VF-nC3 VFDs
• VF-PS1 AC DRIVE
• VF-S11 toshiba inverters

• VF-S15 VFDs