US 12,747,899 B2 · Motor drive system and control method for chiller unit

Abstract

The present application relates to air conditioning technology and motor control technology, and in particular to a motor drive system for a chiller unit, a chiller unit comprising the motor drive system, a control method for a chiller unit, and a computer-readable storage medium on which is stored a computer program for implementing the method. A motor drive system for a chiller unit according to an aspect of the present application comprising: a variable frequency drive unit configured to drive a first motor; a power frequency drive unit configured to drive a second motor; and a control unit configured to adapt a load demand of the chiller unit by controlling output power of the variable frequency drive unit and the power frequency drive unit.

Claims19

Dependent claims

A motor drive system for a chiller unit, the chiller unit comprising a first compressor, a first motor for the first compressor, a second compressor and a second motor for the second compressor, the motor drive system comprising:

a variable frequency drive unit configured to drive the first motor;
a power frequency drive unit configured to drive the second motor;
a control unit configured to adapt a load demand of the chiller unit by controlling output power of the variable frequency drive unit and the power frequency drive unit;
wherein the control unit controls the output of the variable frequency drive unit and the fixed frequency drive unit by:
adapting the load demand by operating the variable frequency drive unit and the fixed frequency drive unit when the load demand is greater than a second critical value and less than a third critical value.

2 more elements

A control method for a chiller unit, the chiller unit comprising a first compressor, a first motor for the first compressor, a second compressor and a second motor for the second compressor, the method comprising:

utilizing a variable frequency drive unit and a power frequency drive unit to drive the first motor and the second motor respectively, wherein a load demand of the chiller unit is adapted by controlling output power of the variable frequency drive unit and the power frequency drive unit;
and
controlling the output of the variable frequency drive unit and the fixed frequency drive unit by:
adapting the load demand by operating only the variable frequency drive unit when the load demand is less than or equal to a first critical value.

1 more element

Dependencies are inferred from the claim text.

Motor drive system and control method for chiller unit

Life of this patent

Motor drive system and control method for chiller unit

Life of this patent

Abstract

Claims19