Tripless control method for general-purpose inverters

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/28.158826· OSTI ID:6933198

Mutoh, N; Ueda, A ^[1]; Nandoh, K; Ibori, S ^[2]

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1. Hitachi Ltd., Ibaraki (Japan). Hitachi Research Lab.
2. Narashino Works, Hitachi Ltd., Chibaa-ken (Japan)

In this paper a new control method is described. This method prevents general-purpose inverters without current regulators from tripping easily, i.e., to be tripless no matter how their load is varied, and enables motors to rotate stably at high frequencies. This control is performed using only current sensors and is a combination of PWM control and torque control. This approach for PWM control changes an asynchronized mode to a synchronized mode when the modulation ratio becomes more than one. This enables the carrier wave frequency to be continuously varied with the inverter frequency. As a result, motors can rotate stably over a wide frequency range. The torque control uses a real and reactive component detector, magnetic flux compensator, slip compensator, and current limit controller.

• OSTI ID: 6933198
• Journal Information: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States) Vol. 28:5; ISSN 0093-9994; ISSN ITIACR
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240100* -- Power Systems-- (1990-)
CONTROL SYSTEMS
CURRENT LIMITERS
DATA
DESIGN
ELECTRICAL EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
INVERTERS
LOAD MANAGEMENT
MANAGEMENT
NUMERICAL DATA
ON-LINE MEASUREMENT SYSTEMS
ON-LINE SYSTEMS
PLANNING
POWER SYSTEMS
RELIABILITY
TORQUE