|
Summary
Introduction:
The basic mechanical principles of the TriTec Electric Motor (TEM) is the same as the pressure driven power unit described in the Technology Overview attached. The TEM can generate very high torque at low speed from the moment of rotation. While the electrically driven TEM lacks the ability to take advantage of an expanding gas as in the case of the pressure driven TriTec Power Units (TPU), it has the advantages of controllability beyond what can be achieved by pressure driven power units.
Descriptions:
The TEM operates similarly to the compressed air operated TPU, i.e. an electrically powered linear piston acting on a multi-lobe transmitter causing the transmitter to rotate. The fast reaction of a linear piston (linear motor) is translated into fast reacting rotary motion because of the lower inertia of the transmitter. The removable pistons are positioned to allow greater cooling of the coils therefore allowing the TEM to operate in an extended period continuously with little performance degradation.
The linear piston developed by the TriTec team has high positional accuracy which also translates to high positional accuracy of the rotary motor. The ability to control force and speed of the linear piston electronically provided a great deal of control for torque and speed output. The modular nature of the TriTec design coupled with the ability to mix and match various output pistons to various shapes of transmitters (cams), the TEM can be a user configurable power unit with flexibility unmatched by any other power drive.
Advantages:
- High torque at very low rpm, with wider torque speed range than conventional direct drives
- Faster reaction and greater accelaration from rest
- Instant reversibility for both full rotation and partial rotation
- High degree of controllability for positioning speed and torque
- Suitable for extended operation and higher temperature operation
|
- Flexible size and output configurations
- Built-in redundancy, the TEM will continue to perform with failed pistons, depending on the configuration
- Ability to hold position can be built into electronic controls
- Easy to maintain, lower downtime for maintenance and lower inventory costs
|
Performance References:
| Linear Electric Actuator (LEA) - Demo Unit @ 110 vac, 15 A |
| Instantaneous Force @ 5mm |
Value |
Unit |
| 1128 |
N |
| Position Accuracy |
1 |
micron |
| Max Acceleration |
200 |
m/s2 |
| Max Speed |
10 |
m/s |
| TriTec Electric Motor (TEM) |
| Max Instantaneous Torque |
52.5 |
N.m |
| Position Accuracy (w/11 bit encoder) |
0.176 |
degree |
| Max Acceleration (no load) |
1175 |
Rad/s2 |
| Max Temperature at 3A w/Motor Stall |
75 |
Deg C |
Two Technologies in One
From Dreams to Reality:
The TEM is really two technologies in one. The TriTec research team came up with two proprietary technologies to make the TEM a reality.
The TEM consists of a uniquely designed linear actuator (piston) that can produce a very high thrust comparing against other similarly sized linear actuators. Combining that with the original TriTec technology, which can produce torque much more effectively from a linear force, result in a variable speed rotary motor.
The TEM can produce maximum torque from the moment of rotation and can be rotated in full or partial rotation in forward and reverse directions with the same performance. It has very good acceleration and can be positioned in increments of a fraction of a degree.
The linear actuator is a standalone technology in itself. It can be employed independently from the TEM as a high speed, high thrust, and accurate positioning linear motor.
Electricity has provided convenience to life in the twentieth century unmatched by any other power sources. Much work has been done in the past to turn an electrically generated linear force into useful torque of a rotary motor. The limitation of the traditional crank has kept the ideal from reality until now.
The new concept created by the inventors of the TriTec technology has today given birth to a new electric motor: an agile direct drive motor, with high start-up torque that is fully user configurable.
Modularity and Configurability:
The TriTec Electric Motor (TEM) is constructed from modular components, allowing the user to mix and match the various components to assemble a power unit that is tailored to the requirements of a particular application.
An electric piston generating a linear force to the centre of rotation (the main shaft) causes the transmitter, which is mounted on the drive shaft to rotate. A series of pistons placed outside the circle of rotation of the transmitter is controlled electronically by a computer giving the TEM unlimited control of torque, speed and position combinations.
Examples of Component Variability:
 
Independent control of speed, position, and torque, allows the TriTec Electric Motor to operate as a direct drive electric motor as well as providing servo capabilities.
Advantages:
- High torque at very low rpm, with wider torque speed range than conventional direct drives
- Faster reaction and greater acceleration from rest
- Instant reversibility for both full rotation and partial rotation
- High degree of controllability for positioning, speed and torque
- Suitable for extended operation and higher temperature operation
- Flexible size and output configurations
- Built-in redundancy, the TEM will perform with occasional piston failure
- Ability to hold position can be build into electronic controls
- Easy to maintain, lower downtime for maintenance and lower inventory costs
|
