High Performance Motor Protection Output Filter
The MotorShield eliminates harmful dv/dt to result in a sine wave output:
- Prevents motor heating and insulation damage
- Greatly extends motor and cable life by reduction of motor noise, vibration, and heat
- Specific applications can reach 15,000 feet
2nd Day Shipping
2nd day shipping is guaranteed on all 480 V MotorShield sine wave filters up to 305 amps. For 600 V applications and higher amp rating, please contact TMS for more details.
Typical Problems, Superior Solutions With MotorShield
As Pulse Width Modulated (PWM) Drives are incorporated into various applications and processes, the increased energy savings and decreased maintenance on variable frequency drives can be offset by increases in motor failures.
High voltage spikes caused by a phenomenon known as reflected wave (dv/dt) occur when there are long cable runs between the drive and the motor. The impedance on either end of the cable run does not match, causing voltage pulses to be reflected back in the direction from which it arrived. As these reflected waves encounter other waves, their values add, causing higher peak voltage.
Peak voltages on a 480 V system can reach 1,600 V. These high peak voltages will cause a rapid breakdown of motor insulation, leading to motor failure.
TCI’s MotorShieldTM improves system performance by protecting the motor from the harmful effects of reflected waves and preventing motor failure associated with insulation failure, overheating, and noise.
For Demanding Constant Torque Applications
For demanding constant torque applications, we recommend the MotorGuard Sine Wave Filter.
TMS offers the MotorGuard sine wave filter. This robust, heavy-duty filter delivers reliable sine wave filter performance where a filter with greater application flexibility and performance is needed.
Performance