摩托车自动离合E-Clutch电机驱动方案

不久前，本田公司在全球网站上发布了他们的全新E-Clutch技术，从外媒社交媒体上的反响看来，评价褒贬不一，这并不奇怪。大多数人对这一创新表示肯定，但也有一些人认为它可能成为又一个电子“保姆”系统。

为了更好地理解引发争议的原因，最好从解释E-Clutch的本质开始。正如本田所述，这是一种电控系统，用于提供瞬间、精准的离合器控制，包括启动、换挡和停车，相较于骑手手动操控离合器更加自然。更值得一提的是，常规的机械离合器操作方式仍然存在，因此可以选择关闭，按照传统方式操作离合器。

ST E-Clutch 主要方案及特性：

1. 12 V DC power supply connector
2. Connector for DC motors
3. Current sensing network based on the internal operational amplifier of the L99H92 driver
4. External current sensing network based on the TSC103
5. Fail-safe input negative button
6. RSENSE for the current sensing networks
7. Connector for the L99H92 driver control
8. Connector for the supply of the L99H92 I/Os and current sense amplifier output stage
9. SPI connector
10. Sensing (current sensing and supply sensing) connector
11. L99H92 driver
12. STL285N4F7AG external MOSFET for full-bridge/half-bridge configuration
13. TSC103 operational amplifier for the high-side current sensing
14. External reverse battery protection

►场景应用图

►展示板照片

►方案方块图

►核心技术优势

• 高达50 A电机驱动 • 通过可编程增益电流传感实现防夹点检测 • 在线，低侧和高侧电流传感器 • 故障情况下提醒微控制器，避免通过SPI进行周期性按需故障检查，从而确保及时干预反向电池保护专用电路 • 故障检测能力：    – 开路负载，短地，热报警和过温关机    – 欠/过压保护    – 过电流保护 • 低元件计数 • AutoDevkit生态系统

►方案规格

The L99H92 is a gate driver, which is programmed through a microcontroller. It is designed to drive four external N-channel MOSFET transistors in a single H-bridge or dual independent half-bridge configuration for DC motor control in automotive applications. Moreover, two independent current sense amplifiers are available, used to detect the current in in-line and low-side parts. The L99H92 features available in the AEK-MOT-WINH92 are: • A dual half-bridge driver used to control four external N-channel MOSFET transistors • Two independent current sense amplifiers – Independently programmable gain (10x, 20x, 50x, 100x) – Offset on operational amplifier output centered at VDD/2 or VDD/22 • All the actuator outputs come with the following protection and supervisor features: – Current monitoring (in-line and low side only) – Open-load, short-to-ground, and short-to-battery conditions – Thermal warning and overtemperature shutdown – Under/overvoltage protections – Overcurrent protection – Charge pump monitoring • Charge pump output available for driving an external reverse battery MOSFET protection • Asynchronous and logic independent fail-safe input to switch off all the MOSFETs • DIAGN output pin, which is faster than SPI communication, to alert the microcontroller of a fault occurred in the device • Configurable window watchdog