Global patent index - EP 1020017 A1

EP 1020017 A1 2000-07-19 - SEPARATELY EXCITED DC MOTOR WITH BOOST AND DE-BOOST CONTROL

Title (en)

SEPARATELY EXCITED DC MOTOR WITH BOOST AND DE-BOOST CONTROL

Title (de)

FREMDERREGTER GLEICHSTROMMOTOR MIT FELDSTÄRKUNGS- UND -SCHWÄCHUNGSSTEUERUNG

Title (fr)

MOTEUR C.C. A EXCITATION SEPAREE, AVEC COMMANDE D'AUGMENTATION ET DE BAISSE DE TENSION

Publication

EP 1020017 A1 (EN)

Application

EP 98950806 A

Priority

  • US 9820546 W
  • US 6043097 P
  • US 6046097 P

Abstract (en)

[origin: WO9917436A1] A motor control system is provided comprising an electrically charged battery, an electrical motor, a battery voltage sensor, a motor speed sensor, an armature voltage sensor, an armature current sensor, and a microprocessor. The magnitude of the armature current applied to the motor is a function of a predetermined armature current setpoint signal and the magnitude of the field current applied to the motor is a function of a predetermined field current setpoint signal, a field current correction signal, and a field current de-boost signal. The microprocessor programmed to generate an armature current setpoint signal, a field current setpoint signal, and an armature voltage reference signal. Further, the microprocessor is programmed to (i) compare the armature voltage reference signal to the measured armature voltage signal and generate an armature voltage error signal based on the comparison; (ii) generate the field current correction signal as a function of the armature voltage error signal; (iii) generate an armature-to-field current check function, wherein the check function defines a set of armature current to field current ratio values as a function of armature current; (iv) calculate a ratio of the measured armature current signal to the field current setpoint signal to establish an operating ratio value, (v) compare the operating ratio value to a corresponding armature current to field current ratio value of the armature-to-field current check function, and (vi) establish the field current de-boost signal, wherein the magnitude of the field current de-boost signal is a function of the measured armature current signal and the comparison of the operating ratio value to the corresponding ratio value.

IPC 1-7 (main, further and additional classification)

H02P 5/178; H02P 7/298

IPC 8 full level (invention and additional information)

H02P 7/298 (2006.01)

CPC (invention and additional information)

H02P 7/2985 (2013.01)

Citation (search report)

See references of WO 9917436A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9917436 A1 19990408; AU 9675998 A 19990423; CA 2304294 A1 19990408; CA 2304294 C 20100119; EP 1020017 A1 20000719

INPADOC legal status

2003-03-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020323

2001-01-10 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001123

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000502

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE