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参数资料
| 型号： | L6470PD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 7 A, PDSO36 |
| 封装： | ROHS COMPLIANT, SSOP-36 |
| 文件页数： | 24/61页 |
| 文件大小： | 703K |
| 代理商： | L6470PD |
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Phase current control
L6470
30/61
Doc ID 16737 Rev 1
7.3
BEMF compensation
Using the speed information, a compensation curve is added to the amplitude of the voltage
waveform applied to the motor winding in order to compensate the BEMF variations during
acceleration and deceleration (see Figure 12.).
Compensation curve is approximated by a stacked line with a starting slope (ST_SLP) when
speed is lower than a programmable threshold speed (INT_SPEED) and a fine slope
(FN_SLP_ACC and FN_SLP_DEC) when speed is greater than the threshold speed (see
Figure 12.
BEMF compensation curve
To obtain different current values during acceleration and deceleration two different final
slope values, and consequently two different compensation curves, can be programmed.
Acceleration compensation curve is applied when the motor runs. No BEMF compensation
is applied when the motor is stopped.
7.4
Motor supply voltage compensation
The sinewave amplitude generated by the PWM modulators is directly proportional to the
motor supply voltage (VS). When the motor supply voltage is different from its nominal value,
motor phases are driven with an incorrect voltage. The L6470 can compensate motor supply
voltage variations in order to avoid this effect.
Motor supply voltage should be connected to the integrated ADC input through a resistor
divider in order to obtain VREG/2 voltage at the ADCIN pin when VS is at its nominal value
(see Figure 13).
ADC input is sampled at fS frequency, which is equal to PWM frequency.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6470PDTR | 功能描述:马达/运动/点火控制器和驱动器 dSPIN 7.0A 8 - 45 V DMOS Motor Driver RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L64710GC-30 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Encoder/Decoder |
| L64710GC-40 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Encoder/Decoder |
| L64710GM-25 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Encoder/Decoder |
| L64710GM-30 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Encoder/Decoder |
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