Wesley BC-620-4CA User Manual
Page 5
Curtis 1234/36/38 Manual,
OS
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2 3 J U LY 2 0 0 8 D R A F T
OVERVIEW
Curtis 1234, 1236, and 1238 AC induction motor controllers deliver smooth
power unlike any previous vehicle control system. They provide unprecedented
flexibility and power through inclusion of a field-programmable logic controller
embedded in a state-of-the-art motor controller.
The embedded logic controller runs a fully functional field-oriented AC
motor control operating system (OS) that can be user-tailored via parameter
modification; see Section 3. The OS also contains logic to execute OEM-
developed software, called VCL, that can be used to enhance the controller
capabilities beyond the basics; see Section 7.
VCL (Vehicle Control Language) is an innovative software programming
language developed by Curtis. Many electric vehicle functions are uniquely
built into the VCL code, and additional functions can be OEM-controlled using
VCL code. VCL opens new avenues of customization, product differentiation,
and responsiveness to the market.
The CAN bus communications included in the 1234/36/38, as well as
in many other Curtis products, allow these AC induction motor controllers to
be part of an efficient distributed system. Inputs and outputs can be optimally
shared throughout the system, minimizing wiring and creating integrated
functions that often reduce the cost of the system.
Curtis 1234/36/38 controllers are the ideal solution for traction, hoist,
dual drive, and other motor drive and vehicle control needs.
1
1 — OVERVIEW
Fig. 1
Curtis 1234
(left)
, 1236
(middle)
, and 1238
(right)
AC induction motor controllers.
All three models have the same standard features.
Like all Curtis controllers, the 1234/36/38 offers superior operator control of
motor drive performance. Features include:
✓
High efficiency, field-oriented motor control algorithms
✓
Advanced Pulse Width Modulation technology for efficient use
of battery voltage, low motor harmonics, low torque ripple, and
minimized switching losses
✓
Extremely wide torque/speed range including full regeneration capability
✓
Smooth low speed control, including zero speed
More Features
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