WO2011143087A2 - Chiller motor control system - Google Patents

Chiller motor control system Download PDF

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Publication number
WO2011143087A2
WO2011143087A2 PCT/US2011/035699 US2011035699W WO2011143087A2 WO 2011143087 A2 WO2011143087 A2 WO 2011143087A2 US 2011035699 W US2011035699 W US 2011035699W WO 2011143087 A2 WO2011143087 A2 WO 2011143087A2
Authority
WO
WIPO (PCT)
Prior art keywords
power
motor
chiller
inverter
operative
Prior art date
Application number
PCT/US2011/035699
Other languages
French (fr)
Other versions
WO2011143087A3 (en
Inventor
Tathagata De
Original Assignee
Carrier Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corporation filed Critical Carrier Corporation
Priority to US13/583,961 priority Critical patent/US9825574B2/en
Priority to CN2011800233491A priority patent/CN102934356A/en
Publication of WO2011143087A2 publication Critical patent/WO2011143087A2/en
Publication of WO2011143087A3 publication Critical patent/WO2011143087A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/025—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a power interruption
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/026—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a power fluctuation

Definitions

  • the subject matter disclosed herein relates to motor control systems, particularly motor control systems in cooling systems.
  • FIG. 1 illustrates a prior art example of a motor control system.
  • the system includes a variable frequency drive (VFD) 102 connected to an alternating current (AC) power source 104.
  • the VFD 102 includes a rectifier 106 connected to a direct current (DC) bus 108, an inverter 110 and a VFD controller 109.
  • the inverter is connected to a chiller motor 112.
  • a motor controller 114 is mechanically connected to a chiller compressor 116 and is communicatively connected to the AC power source 104 and the chiller motor 112 via the VFD controller 109 and the inverter 110.
  • the rectifier 106 receives AC power from the AC power source 104 and rectifies the AC power to DC power.
  • the DC bus 108 includes a capacitor that stores a capacitive charge and outputs DC power to the inverter 110.
  • the inverter converts the DC power to AC power and drives the chiller motor 112.
  • the motor controller 114 receives AC power from the AC power source 104 and sends control signals to control the chiller motor 112.
  • a chiller system includes a motor, a motor controller connected to the motor, the motor controller operative to send a control signal to the motor, a rectifier connected to an alternating current (AC) power source, the rectifier operative to receive AC power and output direct current (DC) power, a DC bus connected to the rectifier, a first inverter connected to the DC bus and the motor, the first inverter operative to receive DC power from the DC bus and output AC power to the motor, and a second inverter connected to the DC bus operative to receive DC power and output AC power to the motor controller.
  • AC alternating current
  • DC direct current
  • a method for controlling a system includes receiving alternating current (AC) power from an AC power source, rectifying the AC power into direct current (DC) power, charging a capacitor with the DC power, inverting DC power from the capacitor into AC power, and outputting AC power to a chiller motor and a motor controller.
  • AC alternating current
  • DC direct current
  • a chiller system includes a variable frequency drive unit connected to an alternating current (AC) power source, a chiller motor connected to the variable frequency drive unit, the chiller motor operative to receive AC power from the variable frequency drive unit, an inverter connected to the variable frequency drive unit, the inverter operative to receive DC power from the variable frequency drive unit and output AC power, and a motor controller connected to the inverter and the chiller motor, the motor controller operative to receive AC power from the inverter and send a control signal to the chiller motor.
  • AC alternating current
  • FIG. 1 illustrates a prior art example of a motor control system.
  • FIG. 2 illustrates an exemplary embodiment of a motor control system.
  • FIG. 2 illustrates an exemplary embodiment of a motor control system 200.
  • the system includes a variable frequency drive unit (VFD) 202 that is connected to an AC power source 204.
  • the VFD 202 includes a rectifier 206 connected to a DC bus 208, an inverter 210, and a VFD controller 209.
  • the DC bus 208 includes a capacitor.
  • the system 200 includes a chiller motor 212 mechanically connected to a chiller compressor unit 216.
  • the VFD 202 is connected to an inverter 213 that is connected to a motor controller 214.
  • the chiller motor 212 is connected to the VFD 202 and the motor controller 214 via the VFD controller 209 and the inverter 210.
  • the motor controller 214 may send control signals to the chiller motor 212 directly via the inverter 210, bypassing the VFD controller 209.
  • the rectifier 206 receives AC power from the AC power source 204.
  • the rectifier 206 rectifies the AC power into DC power that charges the capacitor in the DC bus 208.
  • the inverter 210 receives DC power from the capacitor in the DC bus 208 and outputs AC power to drive the chiller motor 212.
  • the inverter 213 receives DC power from the capacitor in the DC bus 208 and outputs AC power to the motor controller 214.
  • the motor controller 214 sends control signals to the chiller motor 212 via the VFD controller 209.
  • the chiller motor mechanically drives the chiller compressor unit 216.
  • the motor controller 214 may send control signals directly to the chiller motor 212, bypassing the VFD controller 209.
  • the capacitive charge stored in the capacitor in the DC bus 208 continues to supply DC power to the inverters 210 and 213 that output AC power to the chiller motor 212 and the motor controller 214 respectively.
  • Supplying both the chiller motor 212 and the motor controller 214 with power from the same source— the capacitor in the DC bus 208— allows both the motor controller 214 and the chiller motor 212 to continue synchronous operation in the event of a loss of AC power.
  • the capacitor in the DC bus 208 is sized to store a capacitive charge that may drive the chiller motor 212 and power the motor controller 214 for approximately 5-15 minutes in the event of a loss of AC power.
  • the parameters described above are mere examples. Alternate systems may include any appropriate design parameters depending on power specifications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Ac Motors In General (AREA)
  • Inverter Devices (AREA)

Abstract

A chiller system (200) includes a motor (212), a motor controller (214) connected to the motor (212), the motor controller (214) operative to send a control signal to the motor (212), a rectifier (206) connected to an alternating current (AC) power source (204), the rectifier (206) operative to receive AC power and output direct current (DC) power, a DC bus (208) connected to the rectifier (206), a first inverter (210) connected to the DC bus (208) and the motor (212), the first inverter (210) operative to receive DC power from the DC bus (208) and output AC power to the motor (212), and a second inverter (213) connected to the DC bus (208) operative to receive DC power and output AC power to the motor controller (214).

Description

CHILLER MOTOR CONTROL SYSTEM
BACKGROUND OF THE INVENTION
[0001] The subject matter disclosed herein relates to motor control systems, particularly motor control systems in cooling systems.
[0002] FIG. 1 illustrates a prior art example of a motor control system. The system includes a variable frequency drive (VFD) 102 connected to an alternating current (AC) power source 104. The VFD 102 includes a rectifier 106 connected to a direct current (DC) bus 108, an inverter 110 and a VFD controller 109. The inverter is connected to a chiller motor 112. A motor controller 114 is mechanically connected to a chiller compressor 116 and is communicatively connected to the AC power source 104 and the chiller motor 112 via the VFD controller 109 and the inverter 110.
[0003] In operation, the rectifier 106 receives AC power from the AC power source 104 and rectifies the AC power to DC power. The DC bus 108 includes a capacitor that stores a capacitive charge and outputs DC power to the inverter 110. The inverter converts the DC power to AC power and drives the chiller motor 112. The motor controller 114 receives AC power from the AC power source 104 and sends control signals to control the chiller motor 112.
[0004] If AC power is lost to the system, the charge stored in the capacitor continues to power the chiller motor however; the motor controller may not receive power and may shutdown.
BRIEF DESCRIPTION OF THE INVENTION
[0005] According to one aspect of the invention, a chiller system includes a motor, a motor controller connected to the motor, the motor controller operative to send a control signal to the motor, a rectifier connected to an alternating current (AC) power source, the rectifier operative to receive AC power and output direct current (DC) power, a DC bus connected to the rectifier, a first inverter connected to the DC bus and the motor, the first inverter operative to receive DC power from the DC bus and output AC power to the motor, and a second inverter connected to the DC bus operative to receive DC power and output AC power to the motor controller.
[0006] According to another aspect of the invention, a method for controlling a system includes receiving alternating current (AC) power from an AC power source, rectifying the AC power into direct current (DC) power, charging a capacitor with the DC power, inverting DC power from the capacitor into AC power, and outputting AC power to a chiller motor and a motor controller.
[0007] According to yet another aspect of the invention, a chiller system includes a variable frequency drive unit connected to an alternating current (AC) power source, a chiller motor connected to the variable frequency drive unit, the chiller motor operative to receive AC power from the variable frequency drive unit, an inverter connected to the variable frequency drive unit, the inverter operative to receive DC power from the variable frequency drive unit and output AC power, and a motor controller connected to the inverter and the chiller motor, the motor controller operative to receive AC power from the inverter and send a control signal to the chiller motor.
[0008] These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
[0010] FIG. 1 illustrates a prior art example of a motor control system.
[0011] FIG. 2 illustrates an exemplary embodiment of a motor control system.
[0012] The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.
DETAILED DESCRIPTION OF THE INVENTION
[0013] FIG. 2 illustrates an exemplary embodiment of a motor control system 200. The system includes a variable frequency drive unit (VFD) 202 that is connected to an AC power source 204. The VFD 202 includes a rectifier 206 connected to a DC bus 208, an inverter 210, and a VFD controller 209. The DC bus 208 includes a capacitor. The system 200 includes a chiller motor 212 mechanically connected to a chiller compressor unit 216. The VFD 202 is connected to an inverter 213 that is connected to a motor controller 214. The chiller motor 212 is connected to the VFD 202 and the motor controller 214 via the VFD controller 209 and the inverter 210. In alternate embodiments, the motor controller 214 may send control signals to the chiller motor 212 directly via the inverter 210, bypassing the VFD controller 209. [0014] In operation, the rectifier 206 receives AC power from the AC power source 204. The rectifier 206 rectifies the AC power into DC power that charges the capacitor in the DC bus 208. The inverter 210 receives DC power from the capacitor in the DC bus 208 and outputs AC power to drive the chiller motor 212. The inverter 213 receives DC power from the capacitor in the DC bus 208 and outputs AC power to the motor controller 214. The motor controller 214 sends control signals to the chiller motor 212 via the VFD controller 209. The chiller motor mechanically drives the chiller compressor unit 216. Alternatively, the motor controller 214 may send control signals directly to the chiller motor 212, bypassing the VFD controller 209.
[0015] If AC power is lost from the AC power source 204, the capacitive charge stored in the capacitor in the DC bus 208 continues to supply DC power to the inverters 210 and 213 that output AC power to the chiller motor 212 and the motor controller 214 respectively. Supplying both the chiller motor 212 and the motor controller 214 with power from the same source— the capacitor in the DC bus 208— allows both the motor controller 214 and the chiller motor 212 to continue synchronous operation in the event of a loss of AC power.
[0016] In the illustrated embodiment, the capacitor in the DC bus 208 is sized to store a capacitive charge that may drive the chiller motor 212 and power the motor controller 214 for approximately 5-15 minutes in the event of a loss of AC power. The parameters described above are mere examples. Alternate systems may include any appropriate design parameters depending on power specifications.
[0017] While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.

Claims

CLAIMS:
1. A chiller system (200) including:
a motor (212);
a motor controller (214) connected to the motor (212), the motor controller (214) operative to send a control signal to the motor (212);
a rectifier (206) connected to an alternating current (AC) power source (204), the rectifier (206) operative to receive AC power and output direct current (DC) power;
a DC bus (208) connected to the rectifier (206);
a first inverter (210) connected to the DC bus (208) and the motor (212), the first inverter (210) operative to receive DC power from the DC bus (208) and output AC power to the motor (212); and
a second inverter (213) connected to the DC bus (208) operative to receive DC power and output AC power to the motor controller (214).
2. The system of claim 1, wherein the system includes a chiller unit (216) mechanically driven by the motor (212).
3. The system of claim 1, wherein the DC bus (208) includes a capacitor electrically connected to the DC bus (208).
4. The system of claim 3, wherein the capacitor is operative to receive DC power from the rectifier (206) and store a capacitive charge.
5. The system of claim 4, wherein the first inverter (210) is operative to receive the stored capacitive charge from the capacitor.
6. The system of claim 4, wherein the second inverter (213) is operative to receive the stored capacitive charge from the capacitor.
7. The system of claim 1, wherein the motor controller (214) is communicatively connected to the motor (212) via a variable frequency drive unit controller (209).
8. A chiller system (200) including:
a variable frequency drive unit (202) connected to an alternating current (AC) power source (204);
a chiller motor (212) connected to the variable frequency drive unit (202), the chiller motor (212) operative to receive AC power from the variable frequency drive unit (202); an inverter (210) connected to the variable frequency drive unit (202), the inverter (210) operative to receive DC power from the variable frequency drive unit (202) and output AC power; and a motor controller (214) connected to the inverter (213) and the chiller motor (212), the motor controller (214) operative to receive AC power from the inverter (213) and send a control signal to the chiller motor (212).
9. The system of claim 8, wherein the variable frequency drive unit (202) includes a rectifier (206) connected to an AC power source (204) operative to receive AC Power and rectify the AC power into DC power.
10. The system of claim 9, wherein the variable frequency drive unit (202) includes a capacitor operative to receive DC power from the rectifier (206) and store a DC charge.
11. The system of claim 10, wherein the variable frequency drive unit (202) includes a second inverter (210) operative to receive DC power from the capacitor and output the AC power to the chiller motor (212).
12. The system of claim 8, wherein the system includes a chiller unit (216) mechanically connected to the chiller motor (212).
13. The system of claim 8, wherein the variable frequency drive unit (202) includes a variable frequency drive unit controller (209) communicatively linked to the motor controller (214) and the chiller motor (212).
14. A method for controlling a system (200), the method including:
receiving alternating current (AC) power from an AC power source (204);
rectifying the AC power into direct current (DC) power;
charging a capacitor with the DC power;
inverting DC power from the capacitor into AC power; and
outputting AC power to a chiller motor (212) and a motor controller (214).
15. The method of claim 14, wherein the method includes controlling the chiller motor (212) with the motor controller (214).
16. The method of claim 14, wherein the method includes driving the chiller motor (212) with the AC power.
17. The method of claim 14, wherein the method includes mechanically driving a chiller unit (216) with the chiller motor (212).
18. The method of claim 14, wherein the DC power from the capacitor is inverted into AC power by a first inverter (210) connected to the chiller motor.
19. The method of claim 14, wherein the DC power from the capacitor is inverted into AC power by a second inverter (213) connected to the motor controller (214).
PCT/US2011/035699 2010-05-11 2011-05-09 Chiller motor control system WO2011143087A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/583,961 US9825574B2 (en) 2010-05-11 2011-05-09 Chiller motor control system
CN2011800233491A CN102934356A (en) 2010-05-11 2011-05-09 Chiller motor control system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33337010P 2010-05-11 2010-05-11
US61/333,370 2010-05-11

Publications (2)

Publication Number Publication Date
WO2011143087A2 true WO2011143087A2 (en) 2011-11-17
WO2011143087A3 WO2011143087A3 (en) 2012-12-06

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PCT/US2011/035699 WO2011143087A2 (en) 2010-05-11 2011-05-09 Chiller motor control system

Country Status (3)

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US (1) US9825574B2 (en)
CN (1) CN102934356A (en)
WO (1) WO2011143087A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014075742A1 (en) * 2012-11-19 2014-05-22 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor
US9509132B2 (en) 2012-11-19 2016-11-29 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8648559B2 (en) * 2011-03-16 2014-02-11 Deere & Company System for controlling rotary electric machines to reduce current ripple on a direct current bus
TWI525982B (en) * 2014-04-21 2016-03-11 台達電子工業股份有限公司 Soft-start protection circuit and mototr driving circuit
US11674727B2 (en) 2021-07-23 2023-06-13 Goodman Manufacturing Company, L.P. HVAC equipment with refrigerant gas sensor

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306307C2 (en) 1993-03-01 1997-08-14 Siemens Ag Procedure for preventing damage to numerically controlled machines in the event of a power failure
US5537830A (en) 1994-11-28 1996-07-23 American Standard Inc. Control method and appartus for a centrifugal chiller using a variable speed impeller motor drive
DE19526491B4 (en) 1995-07-20 2007-08-16 Schuler Pressen Gmbh & Co. Kg Method for supplying electronically controlled drives in and on a press with energy
US5772214A (en) 1996-04-12 1998-06-30 Carrier Corporation Automatic shut down seal control
US20030078742A1 (en) 2001-10-11 2003-04-24 Vanderzee Joel C. Determination and applications of three-phase power factor
US6679076B1 (en) 2003-04-17 2004-01-20 American Standard International Inc. Centrifugal chiller with high voltage unit-mounted starters
US7231773B2 (en) * 2004-04-12 2007-06-19 York International Corporation Startup control system and method for a multiple compressor chiller system
US7176648B2 (en) * 2004-05-18 2007-02-13 Husky Injection Molding Systems Ltd. Energy management apparatus and method for injection molding systems
US7603874B2 (en) 2005-01-24 2009-10-20 American Power Conversion Corporation Split power input to chiller
US7202626B2 (en) 2005-05-06 2007-04-10 York International Corporation Variable speed drive for a chiller system with a switched reluctance motor
JP4762993B2 (en) 2005-09-06 2011-08-31 パナソニック株式会社 Air conditioner control device
US7554276B2 (en) 2005-09-21 2009-06-30 International Rectifier Corporation Protection circuit for permanent magnet synchronous motor in field weakening operation
SE529942C2 (en) * 2006-05-19 2008-01-08 Callenberg Flaekt Marine Ab Ventilation system and procedure
JP4221436B2 (en) * 2006-12-13 2009-02-12 株式会社日立産機システム Power converter
US8004803B2 (en) * 2007-05-08 2011-08-23 Johnson Controls Technology Company Variable speed drive
US7957166B2 (en) 2007-10-30 2011-06-07 Johnson Controls Technology Company Variable speed drive
US8193756B2 (en) * 2008-10-03 2012-06-05 Johnson Controls Technology Company Variable speed drive for permanent magnet motor
US8508166B2 (en) * 2009-08-10 2013-08-13 Emerson Climate Technologies, Inc. Power factor correction with variable bus voltage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014075742A1 (en) * 2012-11-19 2014-05-22 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor
CN104813430A (en) * 2012-11-19 2015-07-29 西门子公司 Switching device for controlling energy supply of downstream electric motor
US9509132B2 (en) 2012-11-19 2016-11-29 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor
US9954464B2 (en) 2012-11-19 2018-04-24 Siemens Aktiengesellschaft Switching device for controlling energy supply of a downstream electric motor

Also Published As

Publication number Publication date
WO2011143087A3 (en) 2012-12-06
CN102934356A (en) 2013-02-13
US9825574B2 (en) 2017-11-21
US20130043819A1 (en) 2013-02-21

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