US 11,933,291 B2 · Compressor, monitoring system, and method of monitoring compressor

Abstract

A compressor, a monitoring system and a method of monitoring a compressor that make it possible to monitor the remaining lifetime of a semiconductor element of a motor control system while the processing load is reduced are provided. A compressor (1) includes: a motor control system (10) that controls the rotation speed of a motor (2); a compressor body (3) that compresses air by being driven by the motor (2); a pressure sensor (20) that is provided on the discharge side of the compressor body (3); and a running controller (11) that performs switching between load running and no-load running on the basis of the pressure sensed by the pressure sensor (20). A motor controller (26) of the motor control system (10) calculates a relative temperature of a semiconductor element relative to a reference temperature by using a temperature of the semiconductor element sensed by a temperature sensor (27) at the time of switching from no-load running to load running, and calculates an amount of change in a remaining lifetime of the semiconductor element corresponding to the relative temperature of the semiconductor element, whereby monitoring the remaining lifetime of the semiconductor element.

Claims15

Dependent claims

A compressor comprising:

a motor;
a motor control system that controls a rotation speed of the motor;
a compressor body that compresses a gas by being driven by the motor;
a pressure sensor that is provided on a discharge side of the compressor body and senses a pressure of the compressed gas;
and
a running controller that performs switching between load running and no-load running on a basis of the pressure sensed by the pressure sensor,
the motor control system having
a motor controller that controls power to be supplied to the motor via a circuit having a semiconductor element, and
a first temperature sensor that senses a temperature of the semiconductor element, wherein
at least one of the motor controller and the running controller is configured to:
calculate a relative temperature of the semiconductor element relative to a reference temperature by using the temperature sensed by the temperature sensor at time of switching from no-load running to load running;
and
calculate an amount of change in a remaining lifetime of the semiconductor element corresponding to the relative temperature of the semiconductor element, whereby the remaining lifetime of the semiconductor element is monitored.

10 more elements

A monitoring system comprising:

a compressor including a motor, a motor control system that controls a rotation speed of the motor, a compressor body that compresses a gas by being driven by the motor, a pressure sensor that is provided on a discharge side of the compressor body and senses a pressure of the compressed gas, and a running controller that performs switching between load running and no-load running on a basis of the pressure sensed by the pressure sensor, the motor control system having a motor controller that controls power to be supplied to the motor via a circuit that has a semiconductor element and having a first temperature sensor that senses a temperature of the semiconductor element;
and
a monitoring server that receives, from the compressor via a communication network, a running condition of the compressor, and a sensing result of the first temperature sensor, wherein
the monitoring server is configured to:
calculate a relative temperature of the semiconductor element relative to a reference temperature by using the temperature sensed by the temperature sensor at time of switching of the compressor from no-load running to load running;
and
calculate an amount of change in a remaining lifetime of the semiconductor element corresponding to the relative temperature of the semiconductor element, whereby the remaining lifetime of the semiconductor element is monitored.

4 more elements

A method of monitoring a compressor including a motor, a compressor body that compresses a gas by being driven by the motor, a pressure sensor that is provided on a discharge side of the compressor body and senses a pressure of the compressed gas, at least one controller having a functionality of switching between load running and no-load running on a basis of the pressure sensed by the pressure sensor and a functionality of controlling power to be supplied to the motor via a circuit that has a semiconductor element, and a first temperature sensor that senses a temperature of the semiconductor element, the method comprising:

calculating a relative temperature of the semiconductor element relative to a reference temperature by using the temperature sensed by the first temperature sensor at time of switching of the compressor from no-load running to load running;
and
calculating an amount of change in a remaining lifetime of the semiconductor element corresponding to the relative temperature of the semiconductor element, whereby the remaining lifetime of the semiconductor element is monitored.

Dependencies are inferred from the claim text.

Compressor, monitoring system, and method of monitoring compressor

Life of this patent

Compressor, monitoring system, and method of monitoring compressor

Life of this patent

Abstract

Claims15