Speed Control Motor/Brushless Motor When Using at an Altitude of More than 1,000 m above Sea Level
As the altitude increases, the heat radiation effect in the atmosphere decreases, requiring measures such as reducing the ambient temperature of the product.
The following are the conditions for using the equipment at altitudes exceeding 1,000 m but below 2,000 m.
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Target Products
- US2 Series*
- DSC Series*
- *Excluding JH gearheads and JL gearheads.
Motor and Driver Operating Conditions
If the motor and driver are to be used at an altitude of 1,000 m above sea level and no higher than 2,000 m, reduce the ambient temperature as follows.
For example, if you use a product with a maximum ambient temperature limit of 40 °C at an altitude of 2,000 m, the maximum ambient temperature limit would be 32 °C.
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Target Products
- BMU Series*
- BLE2 Series*
- BXII Series
- BLH Series
- *Excluding JV gearheads, JB gearheads, and JH gearheads.
Motor Operating Conditions
If you use the motor at an altitude exceeding 1,000 m but below 2,000 m, lower the ambient temperature or decrease the load torque as follows.
Reducing the Ambient Temperature
For example, if you use a product with a maximum ambient temperature limit of 40 °C at an altitude of 2,000 m, the maximum ambient temperature limit would be 32 °C.
Reducing the Load Torque
For example, when used at 2,000 m above sea level, the upper limit value of the load torque is 80 % of the rated value.
Please note that rated torque varies depending on the rotation speed used.
Brushless Motor Speed - Torque Characteristics
When calculating the torque value according to the rated ratio above, use the torque value according to the rotation speed used.
The torque value at a certain rotation speed can be confirmed using the speed - torque characteristics diagram, as shown in the figure on the right.
[Example calculation when using a 120 W BMU motor at 2,000 m above sea level]
| Speed [r/min] | Torque [N·m] | Rated Ratio of Upper Limit Value | Upper Limit Value [N·m] |
|---|---|---|---|
| 80~2,000 | 0.450 | 80 % | 0.36 |
| 3,000 | 0.382 | 0.3056 | |
| 4,000 | 0.287 | 0.2296 |
Driver Operating Conditions
If the driver is to be used at an altitude of 1,000 m above sea level and no higher than 2,000 m, reduce the ambient temperature as follows.
For example, if a product with an upper ambient temperature limit of 40 °C is used at 2,000 m above sea level, the upper ambient temperature limit is 32 °C.
When Using Gearheads
Use at an altitude of 1,000 m above sea level and no higher than 2,000 m.
At higher altitudes, the temperature rise due to the difference between the ambient air pressure and the outside air pressure and the decrease in heat radiation effect may cause a decrease in life of the oil seal and grease leakage inside the gearhead.
If grease leakage becomes a problem, periodically check for grease oozing or install an oil catcher or similar device on the equipment.