Motor Controllers





CAN Motor Controller in a High-Speed Model BNHP-35-000 Hydrogen Recirculation Compressor

Barber-Nichols (BN) can provide either off-the-shelf motor controllers or clean-sheet designs for custom applications.  While our primary focus is high-speed, permanent magnet, brushless DC motors, BN has experience with switched reluctance, induction, and custom electric motor control.  BN motor controllers are ideally suited for active speed control of fans, compressors, pumps, and other turbomachinery.  High-speed motor controllers are a Barber-Nichols specialty.

Motor Controller Features

  • Flexible Speed Control and User Interface
    • Speed input and start-stop control via front panel
    • Speed control via 0-10V or 4-20mA input
    • Start-Stop and setpoint selection via switch inputs
    • Relay outputs for status or auxiliary control
    • Full status and control via CAN Bus or RS-232
    • Full status, control, and diagnostics via RS-232 or USB
  • Flexible Commutation and Phase Angle Control
    • Full sensorless operation
    • Hall input
    • One-per-revolution input
    • Encoder input

Generator Controllers

In addition to motor control products, Barber-Nichols (BN) also offers high-speed generator controllers specifically tailored to turbo-generator systems.  Modern turbines typically operate at high speeds and can often operate across a wide speed range with changing input conditions.  For a generator system, this adds the complexity of variable output voltage and variable frequency.  In order to be useful, the generator output must be converted to DC or fixed frequency and fixed voltage AC.

BN controllers utilize either active rectification to produce regulated DC power or passive rectification to produce unregulated DC.  The DC power can then be used directly, processed via DC-DC converter to a new DC voltage, or inverted to an AC output at customer-specified voltage and frequency.   In addition, BN generator controllers can provide over-speed protection, active speed regulation, or fail-safe braking during fault scenarios.

Generator Controller Features

  • Flexible control and user interface options
  • Flexible commutation and phase angle control
  • Closed-loop turbine speed control via an auxiliary load resistor
  • Fail-safe over-speed protection
  • Regulated DC output across wide-range turbine input
  • Regulated AC output to customer specification
  • UL/IEEE grid-tie certification available at customer request
  • 1W to 200 kW+ power range