поискавой системы для электроныых деталей |
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SI-7115B датащи(PDF) 3 Page - Sanken electric |
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SI-7115B датащи(HTML) 3 Page - Sanken electric |
3 / 5 page 35 SI-7115B s Thermal design In SI-7115B, the avalanche diode of the phase-switching transistor is operated in breakdown condition and the en- ergy built up in the inductance of the motor coil is dissipated as heat of the transistor. Hence, when the motor rotates, the internal heat dissipation increases compared with when the motor is stopped. Therefore, the internal heat dissipation of 7115B can be computed from the data taken with actual load through the following procedures. (1) Vary the rotation speed of the motor within the actual operating range in a circuit under actual load conditions and measure the supply current ICC and the correspond- ing output current IO1 and IO2. (2) Obtain the internal power dissipation Pdiss (4-phase) of 7115B through the following formula. Pdiss = VCC•ICC – (IO12 + IO22)•RL The figure below shows the relationship between frequency (PPS) and ICC, Pdiss, and case temperature TC. SI-7115B Torque characteristics 2-phase excitation 1-2 phase excitation 50 100 500 1000 5000 Frequency (PPS) Motor 103G–775–1240 VCC=24V IO = 1.0A/ 0 1.0 2.0 φ 50 100 500 1000 5000 Frequency (PPS) 5.0 4.0 3.0 2.0 1.0 0 Motor KP6M2-001 VCC=24V IO = 1.0A/ SI-7115B Torque characteristics 2-phase excitation φ 8 13 10 15 1 2 4 5 3 17 6 7 9 14 16 11 12 A B A B Excitation signals F 2.2 10V + – Rx b a AA B B IO1 IO2 A A A VCC ICC Method for measuring current (circuit under actual load conditions) 15 SI-7115B Stepper motor µ SI-7115B Frequency vs. Supply current, Internal power dissipation and Case temperature (Example) Power down circuit RY RX Power down Transistor TR 2 4 5 3 SI-7115B 1500 1000 500 0 Frequency (PPS) 0 0 0 50 10 1 100 20 2 ICC Supply current Pdiss = VCC • ICC -RL (IO12 + IO22) TC Temperature of heatsink adjacent to SI-7115B ICC VCC A A A SI 7115B AB AB I01 I02 M Motor : 23 PM-C109 no load VCC = 24V IO = 1.0A/ 2-phase excitation Heatsink 100 x 100 x 2A Ta = 25°C Pdiss ICC max φ TC Application Note s Power down mode The SI-7115B can be operated in power down mode. The circuit is shown below. As shown in the figure, when the power down tran- sistor is switched on, (Ry is power down resistor) RX/RY becomes a current fixing resistance and the current during power down mode can be obtained by substituting this resistance to RX in the previous Fig. A. s Example of Frequency vs. Torque characteristics The following two graphs show the relationship between frequency (pps) and pull-out torque (kg - cm) of SI-7115B when used with two types of motor. |
Аналогичный номер детали - SI-7115B |
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Аналогичное описание - SI-7115B |
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