摩托車自動離合E-Clutch電機驅動方案

不久前，本田公司在全球網(wǎng)站上發(fā)布了他們的全新E-Clutch技術，從外媒社交媒體上的反響看來，評價褒貶不一，這并不奇怪。大多數(shù)人對這一創(chuàng)新表示肯定，但也有一些人認為它可能成為又一個電子“保姆”系統(tǒng)。

為了更好地理解引發(fā)爭議的原因，最好從解釋E-Clutch的本質開始。正如本田所述，這是一種電控系統(tǒng)，用于提供瞬間、精準的離合器控制，包括啟動、換擋和停車，相較于騎手手動操控離合器更加自然。更值得一提的是，常規(guī)的機械離合器操作方式仍然存在，因此可以選擇關閉，按照傳統(tǒng)方式操作離合器。

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

?場景應用圖

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?方案方塊圖

?核心技術優(yōu)勢

? 高達50 A電機驅動 ? 通過可編程增益電流傳感實現(xiàn)防夾點檢測 ? 在線，低側和高側電流傳感器 ? 故障情況下提醒微控制器，避免通過SPI進行周期性按需故障檢查，從而確保及時干預反向電池保護專用電路 ? 故障檢測能力：    – 開路負載，短地，熱報警和過溫關機    – 欠/過壓保護    – 過電流保護 ? 低元件計數(shù) ? AutoDevkit生態(tài)系統(tǒng)

?方案規(guī)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