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Introduction
Congratulations on the purchase of the new W7 Adjustable Speed Drive (ASD). The W7 ASD is an
18-pulse PWM drive designed for use with 3-phase AC induction motors. This 18 pulse design includes
an 18 pulse input diode bridge rectifier combined with and an integral phase shifting transformer.
U.S. Patent 6396723.
Japan Patent pending 2000-179543.
The drive has been designed for applications that require low total harmonic distortion (THD) at the
drive input terminals (6% typical) and to allow compliance with IEEE 519 1992 at the point of common
coupling.
The W7 ASD is ideally suited to drive variable torque loads. Toshiba's technology, quality, and
reliability enables the motor to develop high torque and provide compensation for motor slip, which
results in smooth, quick starts and highly efficient operation. The W7 ASD uses digitally-controlled
pulse width modulation. The programmable functions may be accessed via the easy-to-use menu. These
features, combined with Toshiba's high-performance software, delivers unparalleled motor control and
reliability.
The W7 ASD is a very powerful tool, yet surprisingly simple to operate. The W7 ASD has an easy-to-
read LCD screen that provides easy access to the many monitoring and programming features of the
W7 ASD. The motor control software is menu-driven, which allows for easy access to the motor control
parameters and quick changes when required.
To maximize the abilities of your new W7 ASD, a working familiarity with this manual will be
required. This manual has been prepared for the W7 ASD installer, operator, and maintenance
personnel.
The W7 ASD is truly Reliability in motion.
Important Notice
The instructions contained in this manual are not intended to cover all details or variations in equipment
types, nor may it provide for every possible contingency concerning the installation, operation, or
maintenance of this equipment. Should additional information be required contact your Toshiba
representative.
The contents of this manual shall not become a part of or modify any prior or existing agreement,
commitment, or relationship. The sales contract contains the entire obligation of Toshiba International
Corporation. The warranty contained in the contract between the parties is the sole warranty of Toshiba
International Corporation and any statements contained herein do not create new warranties or modify
the existing warranty.
Any electrical or mechanical modifications to this equipment without prior written consent of
Toshiba International Corporation will void all warranties and may void the UL/CUL listing or
other safety certifications. Unauthorized modifications may also result in a safety hazard or
equipment damage.
Misuse of this equipment could result in injury and equipment damage. In no event will Toshiba
Corporation be responsible or liable for direct, indirect, special, or consequential damage or
injury that may result from the misuse of this equipment.