Direct numeric 3D sensorless converter for pump flow and pressure

Patent metadata

Field	Value
Publication number	US-10670010-B2
Application number	US-201715616271-A
Country	US
Kind code	B2
Filing date	Jun 7, 2017
Priority date	Jun 7, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A pump controller features a signal processor configured to respond to signaling containing information about three corresponding discrete arrays with respect to a discrete motor speed for each system position at a motor speed derived from 3D discrete distribution surfaces of motor power, pump differential pressure and flow rate by respective numerical interpolations; and determine corresponding signaling containing information to control a pump, or pumps in a system of pumps, or a system of pumps based upon a corresponding pump differential pressure and flow rate at the motor speed for a corresponding power reading value determined using a numerical interpolation of the three corresponding discrete arrays, the signaling received. The signal processor is configured to provide the corresponding signaling as control signaling to control the pump, or the pumps in the system of pumps, or the system of pumps.

First claim

What we claim is:

1. A pumping system, comprising:
a pump controller having a signal processor or processing module configured to:
respond to signaling received containing information about three corresponding discrete arrays with respect to a discrete motor speed for each system position at a motor speed derived from 3D discrete distribution surfaces of motor power, pump differential pressure and flow rate by respective numerical interpolations;
determine corresponding signaling containing information to control a pump, or pumps in a system of pumps, or a system of pumps based upon a corresponding pump differential pressure and flow rate at the motor speed for a corresponding power reading value determined using a numerical interpolation of the three corresponding discrete arrays, and the signaling received; and
provide the corresponding signaling as control signaling to control the pump, or the pumps in a system of pumps, or the system of pumps.

2. A pumping system according to claim 1 , wherein the signal processor or processing module is configured to implement 3D discrete distribution functions of the motor power, the flow rate and the pump differential pressure with respect to the discrete motor speed for each system position that include, or takes the form of, the equations, as follows:
w ( W ij ,n i ,C vj )=0,  (1.1)

g ( Q ij ,n i ,C vj )=0, and  (1.2)

p ( P ij ,n i ,C vj )=0,  (1.3)

where the functions w , q and p are 2 dimensional discrete numerical distribution functions with respect to a discrete motor speed of n i and system position of C vj , based upon matrices of 3D discrete pump data of (P ij ,Q ij ,W ij ), where i=1, 2, . . . N and j=1, 2, . . . , M, respectively.

3. A pumping system according to claim 2 , wherein the signal processor is configured to determine discrete motor power, flow rate and pump differential pressure of w j , q j and p j at a given motor speed of n by numerical interpolation with respect to the discrete motor speed of n i at each discrete system position of C vj with j=1, 2, . . . , M, respectively, in form of the equations, as follows:
w j ( n )= w i ( n i ,W ij ,n ),  (2.1)

q j ( n )= q i ( n i ,Q ij ,n ), and  (2.2)

p j ( n )= p i ( n i ,P ij ,n ),  (2.3)

where w i , q i and p i are discrete numerical distribution functions with respect to the discrete motor speed of n i based upon the matrices of 3D discrete pump data of (P ij ,Q ij ,W ij ).

4. A pumping system according to claim 1 , wherein, by the numerical interpolation of 3 discrete array points of w j , q j and p j , pump pressure and flow rate for a motor power of w at a motor speed of n is represented by the equations, as follows:
Q ( n,w )= q j ( w j ( n ), q j ( n ), w ),  (3.1)

P ( n,w )= p j ( w j ( n ), p j ( n ), w ),  (3.2)

C v ( w,n )= C v ( w j ( n ), C vj ,w ),  (3.3)

where q j , p j and C i , are the pump differential pressure, pump flow rate and system coefficient numerical distribution functions with respect to a corresponding motor power of w j or w at the motor speed of n.

5. A pumping system according to claim 1 , wherein the pumping system comprises at least one memory including computer program code;
the at least one memory and computer program code configured to, with the signal processor or processing module, cause the signal processor or processing module at least to receive the signaling and determine the corresponding signaling.

6. A method comprising:
receiving in a pump controller having a signal processor or processing module signaling containing information about three corresponding discrete arrays with respect to a discrete motor speed for each system position at a motor speed derived from 3D discrete distribution surfaces of motor power, pump differential pressure and flow rate by respective numerical interpolations;
determining in the signal processor or processing module corresponding signaling containing information to control a pump, or pumps in a system of pumps, or a system of pumps based upon a corresponding pump differential pressure and flow rate at the motor speed for a corresponding power reading value determined using a numerical interpolation of the three corresponding discrete arrays, and the signaling received; and
providing with the signal processor or processing module the corresponding signaling as control signaling to control the pump, or the pumps in a system of pumps, or the system of pumps.

7. A method according to claim 6 , wherein the method comprises implementing with the signal processor or processing module 3D discrete distribution functions of the motor power, the flow rate and the pump differential pressure with respect to the discrete motor speed for each system position that include, or takes the form of, the equations, as follows:
w ( W ij ,n i ,C vj )=0,  (1.1)

g ( Q ij ,n i ,C vj )=0, and  (1.2)

p ( P ij ,n i ,C vj )=0,  (1.3)

where the functions w , q and p are 2 dimensional discrete numerical distribution functions with respect to a discrete motor speed of n i and system position of C vj , based upon matrices of 3D discrete pump data of (P ij ,Q ij ,W ij ), where i=1, 2, . . . N and j=1, 2, . . . , M, respectively.

8. A method according to claim 7 , wherein the method comprises determining with the signal processor or processing module discrete motor power, flow rate and pump differential pressure of w j , q j and p j at a given motor speed of n by numerical interpolation with respect to the discrete motor speed of n i at each discrete system position of C vj with j=1, 2, . . . , M, respectively, in form of the equations, as follows:
w j ( n )= w i ( n i ,W ij ,n ),  (2.1)

q j ( n )= q i ( n i ,Q ij ,n ), and  (2.2)

p j ( n )= p i ( n i ,P ij ,n ),  (2.3)

where w i , q i and p i are discrete numerical distribution functions with respect to the discrete motor speed of n i , based upon the matrices of 3D discrete pump data of (P ij ,Q ij ,W ij ).

9. A method according to claim 8 , wherein the method comprises representing with the signal processor or processing module, by the numerical interpolation of 3 discrete array points of w j , q j and p j , pump pressure and flow rate for a motor power of w at a motor speed of n, the equations, as follows:
Q ( n,w )= q j ( w j ( n ), q j ( n ), w ),  (3.1)

P ( n,w )= p j ( w j ( n ), p j ( n ), w ),  (3.2)

C v ( w,n )= C v ( w j ( n ), C vj ,w ),  (3.3)

where q j , p j and C i , are the pump differential pressure, pump flow rate and system coefficient numerical distribution functions with respect to a corresponding motor power of w j or w at the motor speed of n.

10. A method according to claim 6 , wherein the method comprises
configuring the signal processor or processing module with at least one memory including computer program code; and
configuring the at least one memory and computer program code to, with the signal processor or processing module, cause the signal processor or processing module at least to receive the signaling and determine the corresponding signaling.

11. A pumping system comprising:
means for receiving in a signal processor or processing module signaling containing information about three corresponding discrete arrays with respect to a discrete motor speed for each system position at a

Assignees

• Fluid Handling Llc

Inventors

• Cheng Andrew A
• Schoenheit Kyle D

Classifications

• F04B23/04

  Combinations of two or more pumps · CPC title

• F04B2203/0209

  Rotational speed · CPC title

• G05D7/0682

  using a plurality of flow sources · CPC title

• F04B2203/0208

  Power · CPC title

• F04B2205/07

  Pressure difference over the pump · CPC title