Torque estimating device of gas compressor

Patent metadata

Field	Value
Publication number	US-10107704-B2
Application number	US-201515534777-A
Country	US
Kind code	B2
Filing date	Nov 20, 2015
Priority date	Dec 10, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A torque estimating device of a gas compressor includes a reference torque characteristic storage unit that stores a reference torque characteristic of the gas compressor as a torque characteristic of the gas compressor in a specific operation state, a torque setting unit that sets a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit, and a torque correcting unit that sets a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation and an elapsed time from startup.

First claim

The invention claimed is:

1. A torque estimating device of a gas compressor, comprising:
a reference torque characteristic storage unit configured to store a reference torque characteristic of a gas compressor as a torque characteristic of the gas compressor in a specific operation state;
a torque setting unit configured to set a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit; and
a torque correcting unit configured to set a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation.

2. A torque estimating device of a gas compressor, comprising:
a reference torque characteristic storage unit configured to store a reference torque characteristic of a gas compressor as a torque characteristic of the gas compressor in a specific operation state;
a torque setting unit configured to set a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit; and
a torque correcting unit configured to set a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with an elapsed time from startup.

3. A torque estimating device of a gas compressor, comprising:
a reference torque characteristic storage unit configured to store a reference torque characteristic of a gas compressor as a torque characteristic of the gas compressor in a specific operation state;
a torque setting unit configured to set a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit; and
a torque correcting unit configured to set a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation and an elapsed time from startup.

4. The torque estimating device of a gas compressor according to claim 3 , wherein the torque correcting unit performs the correction of the torque set by the torque setting unit such that a degree of correction is set to be larger as the speed of rotation is higher and to be smaller as the elapsed time becomes longer.

5. The torque estimating device of a gas compressor according to claim 4 , wherein the torque correcting unit performs the correction of the torque set by the torque setting unit such that a degree of correction is constant when the elapsed time has exceeded a length set in advance.

6. The torque estimating device of a gas compressor according to claim 1 , wherein the torque correcting unit includes a correction factor storage unit that stores the correction factor for correcting the torque set by the torque setting unit, and the torque correcting unit sets the torque at startup by multiplying the torque set by the torque setting unit by the correction factor stored in the correction factor storage unit.

7. The torque estimating device of a gas compressor according to claim 2 , wherein the torque correcting unit includes a correction factor storage unit that stores a correction factor for correcting the torque set by the torque setting unit, and the torque correcting unit sets the torque at startup by multiplying the torque set by the torque setting unit by the correction factor stored in the correction factor storage unit.

8. The torque estimating device of a gas compressor according to claim 3 , wherein the torque correcting unit includes a correction factor storage unit that stores a correction factor for correcting the torque set by the torque setting unit, and the torque correcting unit sets the torque at startup by multiplying the torque set by the torque setting unit by the correction factor stored in the correction factor storage unit.

9. The torque estimating device of a gas compressor according to claim 4 , wherein the torque correcting unit includes a correction factor storage unit that stores a correction factor for correcting the torque set by the torque setting unit, and the torque correcting unit sets the torque at startup by multiplying the torque set by the torque setting unit by the correction factor stored in the correction factor storage unit.

10. The torque estimating device of a gas compressor according to claim 5 , wherein the torque correcting unit includes a correction factor storage unit that stores a correction factor for correcting the torque set by the torque setting unit, and the torque correcting unit sets the torque at startup by multiplying the torque set by the torque setting unit by the correction factor stored in the correction factor storage unit.

Assignees

• Calsonic Kansei Corp

Inventors

• Satou Keita

Classifications

• G01L3/00

  Measuring torque, work, mechanical power, or mechanical efficiency, in general · CPC title

• G01L25/003 Primary

  for measuring torque · CPC title

• G01L5/26

  for determining the characteristic of torque in relation to revolutions per unit of time · CPC title

• F04B2203/0207

  Torque · CPC title

• F04B35/00

  Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for · CPC title