H2W engineers have developed a compact Linear Induction Motor (LMAA-04-01) that can generate 10.6 lbs (47 N) of force at a 15 percent duty cycle. Operating at 208 VAC 3-phase 60 Hz, the synchronous velocity of this LIM is 160 in/sec (4 m/s). The LMAA-04-01 linear induction motor was designed for high speed operation; however, it can also be operated at stall (zero speed) to produce static thrust. The motor is encapsulated using high temperature 350°F (176°C) potting compound, which protects the components and seals it from moisture.
A non-contacting, high-speed, linear motor measuring just 8.7 in. (223 mm) long x 3.0 in. (75 mm) wide x 1.7 in. (43 mm) high, this LIM operates on the same principal as a rotary, squirrel cage induction motor and is typically used in applications that do not require positioning.
The 3-phase coil assembly can be directly connected to the AC line for single speed applications, or to an adjustable frequency drive for variable speed control of the motor. The motors are reversible and can also be dynamically braked.
The laminated coil assembly is used in conjunction with a customer-supplied aluminum and steel reaction plate to produce a force, and a customer-supplied bearing system is required to maintain the 0.125 in. (3.0 mm) air gap between the coil assembly and the reaction plate. The length of the reaction plate is typically equal to the coil assembly length plus the stroke.
Advantages of the LMAA-04-01 linear induction motor:
- Only two parts
- Wide speed range
- No maintenance
- Ease of control and installation
Typical LIM applications:
- Conveying systems
- Baggage handling
- Personal rapid transport systems
- Theme park rides
- Active linear braking systems