variable speed drive definition

variable speed drive. (VSD) means an electronic power converter that continuously adapts the electrical power supplied to a single motor to control the motor’s mechanical power output according to the torque-speed characteristic of the load driven by the motor, by adjusting the power supply to a variable frequency and voltage supplied to the motor. It includes all electronics connected between the mains and the motor including extensions such as protection devices, transformers and auxiliaries;
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variable speed drive means equipment capable of varying the speed of the motor.
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variable speed drive means a piece of equipment that regulates the speed and rotational force, or torque output, of an electric motor and that outputs a variable frequency to a motor to allow it to operate at variable speeds between the motor’s minimum and maximum speed.
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Examples of variable speed drive in a sentence

  • M‐ 7 Install Variable Speed Drive (VSD) on Chilled Water Circulating Pumps Currently, the chilled water system has two (2) 405‐ton chillers piped in parallel.

  • The AHU units for the indoor pool area will be controlled via a BMS time schedule, when the time schedule is turned on the BMS will energise an interface relay in the mechanical switchboard to start the supply air fan (AHU-01) and return air fan (AHU-02) and the Variable Speed Drive VSD speed will be set to run.


More Definitions of variable speed drive

variable speed drive. (abbreviation: 'VSD') means an electronic power converter, integral with the motor, that continuously adapts the electrical power supplied to the electric motor in order to control the mechanical power output of the motor according to the torque-speed characteristic of the load being driven by the motor, excluding variable voltage controllers where only the supply voltage for the motor is varied.
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variable speed drive. (VSD) means an electronic power converter, integrated or functioning as a separate unit, that continuously adapts the electric power supplied to a single motor, or multiple motors in order to control the motor’s mechanical power output according to the torque-speed characteristic of the load driven by the motor, by adjusting the power supply to a variable frequency and voltage supplied to the motor, including EC (electronically commutated) motors’ internal controllers, excluding variable voltage controllers where only the supply voltage for the motor is varied, including all integrated protection devices and auxiliaries;
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variable speed drive has the meaning set out in Section 44 35 00 of Appendix 6-2 [Technical Specifications];
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variable speed drive means an electronic power converter that continuously adapts the electrical power supplied to the electric motor in order to control the mechanical power output of the motor according to the torque-speed char­ acteristic of the load (being driven by the motor), by adjusting the three-phase 50 Hz power supply to a variable frequency and voltage supplied to the motor.
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