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Electric motor, Positioning system, Digital converter, Linear scale, Linear encoder
Text version of the page
| rosmoning oystems Customized Positioning Systems | |||||||||||
| 1.3 Typical Parameters 1.3.1 Winding-Independent Dimensions Fa Relative constant force between primary and secondary part (magnetic basis) that must be handled by a mechanical guide Fc Motor power, which is available in nominal operation as continuous force and which results in warming to 70-80 °C Fp Motor power that can be generated for a short time, which is reached at Ip at the end of the linear modulation range and results in substantial heating up when there is no cooling. Km Motor constant, which expresses the ratio of generated power and dissipation power and consequently the degree of effectiveness. Pv The heat output created in the motor winding, which results in a time-dependent temperature rise dependent on the operating mode (current) and the ambient conditions (cooling) In the upper control Pv is especially high in the upper modulation range (at Ip) due to the quadratic dependency of current, while only relatively slight warming occurs in the range of the nominal current. Pv is calculated using the motor constant Km for a movement section with the required force F: Pv = F/Km2 Pvp Peak dissipation power at Ip Pc Dissipation power at Ic T Permissible winding temperature, which is recorded by sensors or thermal circuit breakers; the created motor surface temperature is dependent on O the actual installation conditions (table size) O the heat dissipation conditions (cooling) O the operating mode and consequently the mean performance entry | |||||||||||
| 1.3.2 Winding-Dependent Dimensions Ic For generating the current connected for continuous force Ip For short-term generation of the peak force of connected peak current Kf Winding dimension, which produces the created force with the current: F = I x Kf Ku Winding dimension, which results dependent on the speed created in the motor terminals-in generator operation: Ug = Ku x v R25 Winding resistance at 25 °C; this increases to approx. 1.2 times the value at 80 °C. | |||||||||||
| can only be determined if these variables are known. | |||||||||||