TWR-100-182-400-3P Limited Angle Torque Motor

The TWR-100-182-400-3P is comprised of a stationary, arc segmented, multipole permanent magnet stator assembly with a low inertia wound wire rotor.

Rotor: The rotor is made up of a single coil of bondable copper magnet wire. The coil is wound and preformed into the desired shape. It is held together with the bonding agents in the wire. It can be encapsulated with aluminum or plastic brackets in order to provide a means for mounting the rotor to the bearing system and payload. The maximum angular excursion is less than 90º.

Stator: The stationary stator assembly consists of multipole permanent magnets that are bonded to steel plates. The 2 opposing steel plates are spaced apart to provide a gap using end plates. The coil rotor assembly moves angularly within this gap. There is no magnetic attractive force between the stator and the rotor.

The WR-100-182-400-3P torquer is available in 2 configurations.

The low profile (Type L) configuration has a smaller overall height which allows it to fit in a more compact space, but has less angular rotation for a given stator arc segment.

The second configuration (Type S) has a larger overall height but has typically twice the angular rotation per given stator arc segment when compared to the Type L torquer.

Limited Angle Torque Motor Advantages:

• No Torque Ripple
• High Angular Acceleration
• No Commutation
• Brushless
• Low Profile

Applications:

• Aerospace
• Semiconductor
• Medical
• Military

Operating Information:

Required Electronics

The motor requires a 1 phase brushless linear amplifier with power supply, that is rated with sufficient current and voltage to meet the motion requirements. A linear amplifier is required because of the very low inductance of the torquer coil assembly. A programmable motion controller is required to close the position loop on the system.

Environmental Considerations

The torquer is a precision device with sensitive components, it should not be mounted in an environment that is wet or excessively dirty. The magnetic assembly is highly magnetic, it should not be placed in an area where loose steel particles can be drawn into the magnetic gap. The torquer should not be mounted in an environment with high ambient temperatures (>50ºC).

Mounting

The torquer is typically supplied with out bearings and a shaft. This allows for the stationary and moving parts of the torquer to be mounted directly to the customers rotary payload assembly. The 2 components of the torquer should be mounted such that they are concentric to one another within .001". The rotor and the stator will have a mounting provisions to allow for attachment to the customers system.

Maintenance

The torquer requires no maintenance.

Ordering Information

Torquers can be ordered for any angular excursion up to 360° and continuous torques up to 1000 ounce-inches. The torquers are built as the orders are placed, they are not stocked, as each customer requirement is different.

Model #	TWR- AAA - BB - CCC - D
where:	AAA is the angular rotation (120 ° is -120) BB is the OD of the torquer (3.5 inch width is -35) CCC is the continuous torque (250 oz-in is -250) D is for special options
TMR is the MR series torquer and TWR is a WR series torquer. (i.e. TMR-120-35-250-0 is a 3.5" OD limited angle torque motor with a 120° angular excursion, 250 oz-in of continuous torque and no special options)

Specifications

Limited Angle Torque Motors
P/N	Degree of Rotation	Type	# of Poles	Continuous Torque oz-in (Ncm)	Peak Torque oz-in (Ncm)	Outside Diameter inches  (mm)	Height inches (mm)	Housed w/ Bearings
TWR-100-182-400-3P ***	100°	WR	3	400 (282)	1200 (846)	18.20 (462.2)	1.45 (36.8)	no

*** Arc segmented torquerMR indicates permanent magnet rotor
WR indicates wound rotor