YASKAWA ES700 Elevator Dedicated Inverter Features

Overshoot and vibration prevention

• Acceleration/deceleration time

• S-curve characteristic switching achieves smooth acceleration and deceleration.

• Through feedforward control, a vibration-free, overshoot-free speed response is achieved.

Smooth operation

• Adjustment of the speed controller (ASR) is also easy.

• Torque ripple is reduced compared with our previous products, achieving smooth operation with a smooth, shock-free comfortable feel.

High-performance load-sensorless starting torque compensation

• With high-performance load-sensorless starting torque compensation (advanced rollback prevention function*) and a high-resolution absolute encoder, the shock when the brake is released can be reduced without adding a load sensor. The control signals of the load sensor can be simplified, and complicated adjustment is not required.

• Rollback prevention: changing the control method makes adjustment easier.

• Further shorten control time and improve responsiveness.

*Rollback prevention function: a torque compensation function that eliminates speed fluctuation when the brake is released and prevents vibration.

Stopping distance control

The inverter automatically calculates the stopping distance and performs positioning in the shortest possible time, thereby shortening positioning time.

Star contactor control function

• Equipped with a motor line-to-line star contactor control function, replacing conventional main board control, to prevent arcing problems caused by poor timing between the main contactor and the star contactor.

• Controls the motor line-to-line star contactor to prevent short circuits in the inverter output.

*This is a function for PM motors. Therefore, it cannot be used for induction motors.

Improved safety through brake feedback

• Supports UCM (Unintended Car Movement)

  *The inverter can be stopped based on the brake response signal to prevent the car from moving while the door is open.

High safety level

• Supports SIL3* (STO).

  *IEC/EN61508 indicates the measure of system safety performance.

• Reliability can be ensured without an output contactor.

• At the same time, reducing installation space and installation work.

Rich rescue operation support

1.Backup power supply support during power failure

• Wide voltage compatibility during rescue operation

        200V class: 48VDC ~ 340VDC

        400V class: 48VDC ~ 680VDC

        Expanded UPS power supply compatibility: single-phase 200V ~ 240V

• Optional control power supply separate from the main circuit backup power supply is available

2.Miniaturization of backup power supply

• Light-load direction search function

  With the light-load direction search function, UPS power consumption during rescue operation can be minimized. If advanced light-load direction search is used, the light-load rotation direction is searched in advance during normal operation, so even with a small UPS power supply capacity, the light-load direction can be determined.

Elevator-specific auto-tuning

Auto-tuning is possible even with the wire rope on the traction sheave

• Optimized auto-tuning method makes selection easier

• Troublesome adjustments such as encoder and motor rotation direction can also be easily performed via navigation

Supports various encoders

• Complementary

• Line driver

• EnDat

• HIPERFACE

• ERN1387

• Biss-C (with and without incremental signals)*

  *In preparation

Various standard functions

• Rich maintenance monitoring

• Long-life design: 10 years

• Models with built-in EMC filter available

• Built-in sensor power supply (+24VDC 150mA)

• Supports DCP3, DCP4 protocols.

  *In preparation

• Supports CANopen-Lift

  *In preparation

Adopts elevator-specific rated 50% ED

• In addition to continuous rating, 50% ED rating is added.

• Broadens the range of capacity selection.