MGM brake motors are asynchronous three-phase totally enclosed fan cooled motors.
The motor brakes in the event of a power supply failure. The braking action is always obtained through a very quick and precise stop, thereby guaranteeing a safe and prompt intervention in the event of an unforeseen power supply failure.
The braking action is obtained without shaft axial sliding and it provides equal braking torque in both directions of rotation. MGM brake motors are particularly suitable for hoisting and traverse applications, tooling machinery, automatic and transfer machinery in textile, ceramic and packing fields and in every situation where precision and quickness in braking are required.
MGM brake motors are designed and assembled as real brake motors. The perfect engineering and assembling combined with a strong and safe brake, make these motors very reliable.
As standard, on the IM B3 mounting (foot mounted), the feet are integrated in the frame (they are not simply attached to the frame) making the motor very sturdy. This feature is very important on those brake motor applications where the stress during start/stop is very high. The brake disc lining material is asbestos free with a high friction coefficient and is very long-lasting. Motors are provided with IP 54 enclosure rating and insulation class F.
On request IP 55 or IP 56 enclosure ratings and class H insulation can be provided. All MGM motors are designed for use with an inverter.
On request it is possible to supply the motor with the encoder fitted on the second shaft end or to have the second shaft end ready to be fitted with an encoder.
For further information please refer to the encoder series section.
BA Series
The BA series consists of three-phase, asynchronous brake motors totally enclosed and fan cooled.
The BA series ranges from 71 right up to 315 frame size. The brake power supply is AC 3-phase as standard.
On request DC brake can be provided with a rectifier integrated in the terminal box.
The rectifier is provided with an over-voltage and radio frequency emission protection device. All BA series motors are provided with a manual brake release. The BA series cooling fan is fitted between the motor and the brake assembly.
The brake moving element and the brake coil have a laminated magnetic nucleus to reduce losses and to allow very fast braking.
BA series main features are:
- a very quick braking action
- both in unlocked and high torque braking
- a constant braking time and a very high number of start/stop cycles also under severe applications.
BM Series
The BM series consists of three-phase, asynchronous brake motors totally enclosed fan cooled. The BM series frame size ranges from 56 up to 160.
As standard the brake power supply is DC with a rectifier integrated in the terminal box. The rectifier is provided with an over-voltage and radio frequency emission protection device.
The cooling fan is fitted at non-drive shaft end.
BM series main features are:
- low braking noise
- gradual acceleration during the motor start and stop and the reduced overall dimensions
Efficency
In Europe, the Commission Regulation 640/2009, adopted on 22 July 2009, specifies the requirements regarding the ecodesign of electric motors. In particular, the Regulation establishes the minimum efficiency classes the motors should have.
The application field of the EuP (Energy-using Products) Regulation includes low voltage three-phase squirrel cage-induction motors for 50Hz or 50/60Hz single speed with the following properties:
- Rated voltage up to 1.000 V
- Rated output between 0,75 kW and 375 kW
- Either 2, 4 or 6 poles
- Rated for continuous duty
Brake motors are exempted from the EuP Motor Regulation.
Brake motors belonging to the BA and BM series have efficiency class IE1.
Although the brake motors are exempted from the EuP Motor Regulation, motors with efficiency class IE2 or IE3 (BAX series and BMX series) are also available on request. In this case it must be specified when ordering as compared to the standard execution.
The table below shows for each powers the efficiency values of the brake motors belonging to the BA and BM series at 50Hz (at 100%-75%-50% of the load) as standard.
Brake motors – BA and BM series
2 poles – 50Hz
| Power (kW) | H | Eff. 100% | Cos φ | Eff. 75% | Eff. 50% |
|---|---|---|---|---|---|
| 0,75 | 71 | 73,2 | 0,80 | 71,6 | 66,3 |
| 0,75 | 80 | 74,0 | 0,86 | 75,1 | 72,2 |
| 1,1 | 80 | 76,5 | 0,86 | 71,6 | 66,3 |
| 1,5 | 90S | 77,2 | 0,86 | 79,3 | 79,4 |
| 2,2 | 90L | 79,7 | 0,86 | 80,4 | 79,5 |
| 3,0 | 100L | 81,5 | 0,81 | 81,6 | 79,5 |
| 4,0 | 112M | 83,1 | 0,84 | 83,5 | 82,5 |
| 5,5 | 112M | 84,7 | 0,85 | 85,0 | 84,0 |
| 5,5 | 132S | 84,7 | 0,86 | 84,7 | 83,2 |
| 7,5 | 132S | 86,9 | 0,85 | 87,7 | 87,0 |
| 9,2 | 132M | 86,9 | 0,85 | 86,7 | 84,8 |
| 11 | 160M | 88,0 | 0,94 | 88,5 | 86,9 |
| 15 | 160M | 89,2 | 0,93 | 89,8 | 89,0 |
| 18,5 | 160L | 89,4 | 0,93 | 89,8 | 89,5 |
| 22 | 180L | 89,9 | 0,95 | 90,0 | 88,7 |
| 30 | 200L | 90,7 | 0,94 | 90,4 | 89,4 |
Brake motors – BA and BM series
4 poles – 50Hz
| Power | H | Eff. 100% | Cos φ | Eff. 75% | Eff. 50% |
|---|---|---|---|---|---|
| 0,75 | 80 | 73,5 | 0,67 | 73,8 | 69,9 |
| 0,9 | 80 | 73,6 | 0,67 | 73,5 | 69,8 |
| 1,1 | 90S | 77,4 | 0,77 | 78,3 | 76,0 |
| 1,5 | 90L | 78,3 | 0,75 | 79,2 | 77,5 |
| 1,85 | 90L | 78,7 | 0,77 | 79,6 | 77,8 |
| 2,2 | 100L | 80,8 | 0,78 | 81,2 | 79,1 |
| 3,0 | 100L | 81,5 | 0,80 | 81,9 | 80,7 |
| 4,0 | 112M | 83,7 | 0,84 | 85,3 | 85,0 |
| 5,5 | 112M | 84,7 | 0,83 | 85,3 | 84,5 |
| 5,5 | 132S | 85,2 | 0,82 | 86,8 | 86,6 |
| 7,5 | 132M | 86,0 | 0,84 | 86,6 | 86,1 |
| 9,2 | 132M | 87,3 | 0,85 | 88,4 | 88,3 |
| 9,2 | 160M | 87,2 | 0,84 | 87,4 | 86,0 |
| 11 | 160M | 88,0 | 0,85 | 88,6 | 87,9 |
| 15 | 160L | 88,7 | 0,87 | 89,2 | 88,6 |
| 18,5 | 180L | 90,6 | 0,89 | 91,4 | 91,1 |
| 22 | 180L | 90,0 | 0,85 | 90,6 | 89,8 |
| 30 | 200L | 90,7 | 0,87 | 91,3 | 91,2 |
| 37 | 225S | 92,6 | 0,85 | 92,8 | 91,8 |
| 45 | 225M | 92,7 | 0,85 | 92,9 | 92,0 |
| 55 | 250M | 92,9 | 0,85 | 93,1 | 92,7 |
| 75 | 280S | 93,1 | 0,86 | 93,3 | 92,9 |
| 90 | 280M | 93,5 | 0,88 | 94,0 | 93,5 |
Brake motors – BA and BM series
6 poles – 50Hz
| Power (kW) | H | Eff. 100% | Cos φ | Eff. 75% | Eff. 50% |
|---|---|---|---|---|---|
| 0,75 | 90S | 70,1 | 0,68 | 70,7 | 68,0 |
| 1,1 | 90L | 72,9 | 0,68 | 73,7 | 71,3 |
| 1,5 | 100L | 78,6 | 0,71 | 79,7 | 77,8 |
| 2,2 | 112M | 78,2 | 0,79 | 79,3 | 77,7 |
| 3,0 | 132S | 83,0 | 0,72 | 83,5 | 81,5 |
| 4,0 | 132M | 83,9 | 0,72 | 84,5 | 83,3 |
| 5,5 | 132M | 84,3 | 0,75 | 84,7 | 83,1 |
| 7,5 | 160M | 85,3 | 0,79 | 85,1 | 83,2 |
| 9,2 | 160L | 87,0 | 0,81 | 87,2 | 86,1 |
| 11 | 160L | 88,0 | 0,80 | 88,4 | 87,1 |
| 15 | 180L | 89,0 | 0,84 | 89,4 | 88,6 |
| 18,5 | 200L | 88,6 | 0,82 | 88,3 | 87,2 |
| 22 | 200L | 89,2 | 0,85 | 88,9 | 88,1 |
| 30 | 225M | 91,1 | 0,78 | 91,7 | 91,2 |
| 37 | 250M | 92,4 | 0,78 | 92,6 | 91,6 |
| 45 | 280S | 92,9 | 0,80 | 93,0 | 92,0 |
| 55 | 280M | 93,5 | 0,80 | 93,8 | 93,0 |
For further information on the Electric motors efficiency Regulations in force, please click here to download the CEMEP guide.