Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2005-09-06
2005-09-06
Martin, David (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S132000, C318S254100, C318S434000, C318S599000, C318S432000, C318S434000, C318S700000
Reexamination Certificate
active
06940239
ABSTRACT:
In a PWM-controlled motor driving device, a phase current is prevented from undergoing an abrupt transition at phase current switching points, thereby reducing vibrations and noise of the motor. A PWM control section produces two independent PWM control pulse signals P1and P2. Two energized phases, which are determined by an energization switching section, are energized with PWM control in parallel according to the PWM control pulse signals P1and P2. A comparison section compares a current detection signal DS, which indicates the level of the current flowing through a motor coil, with various torque command signals TQ1, TQ2and TQ3, which are produced by a torque command signal generation section. A masking section masks comparison results CR1and CR2as necessary. Thus, an ON period of the PWM control pulse signal P1and that of the PWM control pulse signal P2are determined. In this way, phase current switching can be done smoothly with any torque from a low torque to a high torque, thereby preventing an abrupt phase current transition.
REFERENCES:
patent: 4928043 (1990-05-01), Plunkett
patent: 5517095 (1996-05-01), Carobolante et al.
patent: 5949203 (1999-09-01), Buthker
patent: 6020715 (2000-02-01), Yasohara et al.
patent: 6043624 (2000-03-01), Masaki et al.
patent: 6111372 (2000-08-01), Nishimura
patent: 6329781 (2001-12-01), Matsui et al.
patent: 6377008 (2002-04-01), Hirata
patent: 6528968 (2003-03-01), Seima et al.
patent: 6650084 (2003-11-01), Fujioka et al.
patent: 6674258 (2004-01-01), Sakai et al.
patent: 6710569 (2004-03-01), Iwanaga et al.
patent: 1318595 (2004-03-01), None
patent: 08-19284 (1995-01-01), None
patent: 10-59262 (1998-03-01), None
patent: 11-235079 (1999-08-01), None
patent: 2000-125590 (2000-04-01), None
patent: 2001 211680 (2001-08-01), None
patent: 2003-174789 (2003-03-01), None
patent: WO 01/31772 (2001-05-01), None
patent: WO 01/37419 (2001-05-01), None
Iwanaga Taishi
Yamamoto Yasunori
Martin David
McDermott Will & Emery LLP
Smith Tyrone
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