Servo Control:
  • Current controller manages the torque and the field
  • In order to do this it require the motor temperature feeback as well as rotor position. So a feedback device such as resolver or encoder is required.
  • Advantages and application of servo control
    • As you have position feedback, you are able to control the motor position
    • You are able to control the speed at higher accuracies than with inverter control
    • You are able to control the motor torque with high accuracies through all 4 quadrants
    • You have standstill torque at zero speed

Lenze Motors in Servo Mode:
  • All motors to be used in servo mode must have resolver, encoder or absolute encoder feedback. Type of feedback is dependent on
    • Cost effectiveness and robustness for resolver feedback
    • For higher accuracy in synchronisation, a SinCos encoder is used but at a higer cost
    • For applications when position is required on a power cycle, single or multi-turn absolute encoders are used at a higher cost
  • Lenze servo controllers can control standard asynchronous motors, servo synchronous motors as well as servo asynchronous motors. The selection of the motor is based on:
    • Dynamic requirements of the application - high speeds and high accuracy
    • Load and torque requirments - inertia ration between load and motor and torque control
    • Cost considerations
  • Lenze controllers are selected based on:
    • Single axis decentralised control or multi-axis centralised control
    • Application software functions required as well as performance requirements
    • Cost of system solutions
Servo Baseline
Servo Control Mid Range
Servo Control Top Range
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