3-D sensorless conversion method and apparatus for pump differential pressure and flow

Patent metadata

Field	Value
Publication number	US-10119545-B2
Application number	US-201314091795-A
Country	US
Kind code	B2
Filing date	Nov 27, 2013
Priority date	Mar 1, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

The present invention provides apparatus featuring a signal processor or processing module that may be configured at least to: receive signaling containing information about calibrated motor speed and power data for a hydronic pumping system; and determine system pumping flow rate and pressure associated with an equivalent hydronic system characteristic variable, based at least partly on the signaling received. The signal processor or processing module may be configured to provide corresponding signaling containing information about the system pumping flow rate and pressure determined. The corresponding signaling may contain information used to control the hydronic pumping system.

First claim

What we claim is:

1. Apparatus comprising:
a signal processor or processing module configured at least to:
receive signaling containing information about calibrated motor speed and power data for one or more pumps in a hydronic pumping system; and
provide corresponding signaling containing information to control the one or more pumps in the hydronic pumping system, by determining system pumping flow rate and pressure based upon 3-dimensional discrete distribution functions of pump differential pressure, system flow rate and motor power with respect to motor speed and at least one equivalent hydronic system characteristic variable of an instant system curve C v using a 3-dimensional sensorless model or algorithm and the signaling received;

the signal processor or processing module being configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing signaling related to equation no. 1, as follows:
γ( P,Q,W,n,C v )=0,  (1)

where γ presents a power conversion relationship between hydronic, mechanical and electrical from pump to motor drive that is a function of pump differential pressure P; system flow rate Q; motor power W; motor speed n; and the equivalent system characteristic variable of the instant curve C v .

2. Apparatus according to claim 1 , wherein the signal processor or processing module is configured to provide the corresponding signaling as control signaling.

3. Apparatus according to claim 1 , wherein the signal processor or processing module is configured to determine the system pumping flow rate and pressure using the 3-dimensional sensorless model or algorithm, based at least partly on processing the signaling related to the calibrated motor speed and power data.

4. Apparatus according to claim 3 , wherein the signal processor or processing module is configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing signaling related to a power conversion relationship between hydronic, mechanical and electrical parameters from a pump to a motor or drive in the hydronic pumping system.

5. Apparatus according to claim 1 , wherein the at least one equivalent hydronic system characteristic variable includes an equivalent hydronic system characteristic variable for flow rate Q of the hydronic pumping system.

6. Apparatus according to claim 1 , wherein the at least one equivalent hydronic system characteristic variable includes an equivalent hydronic system characteristic variable for pumping pressure P of the hydronic pumping system.

7. Apparatus according to claim 2 , wherein the signal processor or processing module is configured to
determine the 3-dimensional sensorless model or algorithm based upon equation nos. 2.1, 2.2 and 2.3, as follows:
w ( W,n,C v )=0,  (2.1),

g ( Q,n,C v )=0,  (2.2)

and
p ( P,n,C v )=0,  (2.3); and

determine an unknown hydronic system characteristic variable of C v for a pair of calibrated motor speed and power data at an instant of time based upon a motor power function defined as: w(W,n,C v )=0; and
determine the system pumping flow rate and pressure using based upon equation nos. 3.1 and 3.2 for system flow rate and pump differential pressure functions defined as:
g ( Q,n,ŵ ( W,n ))=0,  (3.1)

and
p ( P,n,ŵ ( W,n ))=0,  (3.2),

where w, g and p are 3D functions of motor power of W, system flow rate of Q and the pump differential pressure of P with respect to the motor speed of n and the equivalent system characteristic variable of C v , and where ŵ is an inversely remapped power function of w.

8. Apparatus according to claim 2 , wherein
the apparatus comprises a secondary variable speed pump control hydronic heating and cooling system having the one or more pumps arranged in a process pipe coupled to heaters and coolers; and
the one or more pumps are configured to respond to the control signaling and pump fluid to the heaters and coolers to operate the secondary variable speed pump control hydronic heating and cooling system.

9. Apparatus according to claim 2 , wherein
the apparatus comprises a water booster pumping system having the one or more pumps arranged in a process pipe; and
the one or more pumps are configured to respond to the control signaling and pump a fluid flow in the process pipe to operate the water booster pumping system.

10. Apparatus according to claim 2 , wherein
the apparatus comprises the hydronic pumping system having the one or more pumps arranged in a process pipe; and
the one or more pumps are configured to respond to the control signaling and pump a fluid flow in the process pipe to operate the hydronic pumping system.

11. Apparatus comprising:
a signal processor or processing module configured at least to:
receive signaling containing information about calibrated motor speed and power data for one or more pumps in a hydronic pumping system; and
provide corresponding signaling containing information to control the one or more pumps in the hydronic pumping system, by determining system pumping flow rate and pressure based upon 3-dimensional discrete distribution functions of pump differential pressure, system flow rate and motor power with respect to motor speed and at least one equivalent hydronic system characteristic variable of an instant system curve C v using a 3-dimensional sensorless model or algorithm and the signaling received;

the signal processor or processing module being configured to determine the system pumping flow rate and pressure using the 3-dimensional sensorless model or algorithm, based at least partly on processing the signaling related to the calibrated motor speed and power data;
the signal processor or processing module being configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing signaling related to a power conversion relationship between hydronic, mechanical and electrical parameters from a pump to a motor or drive in the hydronic pumping system; and
the signal processor or processing module being configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing signaling related to equation no. 1, as follows:
γ( P,Q,W,n,C v )=0,  (1)

where γ presents the power conversion relationship between hydronic, mechanical and electrical from pump to motor drive that is a function of pump differential pressure P; system flow rate Q; motor power W; motor speed n; and the equivalent system characteristic variable of the instant curve C v .

12. Apparatus according to claim 11 , wherein the signal processor or processing module is configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing, decoupling and remapping signaling related to an energy conversion function of equation no. 1 taken to directly formulate a corresponding system flow rate, system pressure or pump differential pressure, motor power functions with respect to motor speed and equivalent system characteristics.

13. Apparatus according to claim 12 , wherein the signal processor or processing module is configured to implement the 3-dimensional sensorless model or algorithm based at least partly on processing signaling related to reconstructed 3D functions represented and resolved to yield the pump flow rate and pressure associated with unknown system characteristics at a given motor speed and power, and based at least partly on measured pump and motor calibration data.

14. Apparatus according to claim 13 , wherein the signal processor or processing module is configured

Assignees

• Fluid Handling Llc
• Fluid Handling Llc

Inventors

• Cheng Andrew A
• Scott Graham A
• Gu James J

Classifications

• F05D2270/335

  Output power or torque · CPC title

• F04D15/0088 Primary

  Testing machines · CPC title

• F05D2270/304

  Spool rotational speed · CPC title

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title

• F24D19/1012

  by regulating the speed of a pump · CPC title