Giant/Yamaha vs. Bosch/OEM war winner?

Mike leroy

Active Member
How do you think this war will play out?

  • Giant sells 4.6M bikes/year. Only Indian Hero sells more bicycles.
  • Yamaha $16B revenues.
  • Bosch $49B.

I feel the Yahama SyncDrive Center is superior to the Bosch motor. Haibike sells bikes with both motors.
My favorite eBike is the Giant Full-E 0. My vote goes for Giant/Yamaha.

Yamaha understands both engineering and consumer marketing. The PES1 technology will trickle down to the Yamaha SyncDrive motor. The PES1 motorcycle is sexy:

Step 2: The Pedalplus sensor system precisely registers the amount of force you’re putting into the pedals and your moving speed. This information is sent directly to the I2 driver unit. Giant combines 4 sensors: human torque, motor speed, cadence and bicycle speed.

(Link Removed - No Longer Exists)

Step 3: The I2 driver unit receives the information from the PedalPlus sensors. Via its proprietary software, it is able to send a smoothed-out power curve demand to the EnergyPak power source. Accurate computing allows to maintain an ideal cadence, and makes power consumption more efficient.

The response of this sensor smoothens the ride, especially after every stop. This sensor is inside the motor of central Syncdrives

Step 4: The high-capacity Lithium-ion battery pack produces more power and a longer riding range. The EnergyPak communicates with the I2 driver to deliver just the right amount of power to the SyncDrive motor.

Step 5: Thanks to Giants proprietary Sine Wave software and integrated motor sensors(video), Giant offers you a smooth and quietly on your ride. Because of the wide range of motors, you can choose the most suitable version.

"Since a FET is a simple ON/OFF switch, the power changes to the stator coils is abrupt. Hubs are well-known to be quieter than geared motors or exposed chain-drive non-hub systems. However, even though direct-drives hubs are fairly quiet, there is a certain mild “buzz” that comes with them because of the “square-wave” of the abrupt on/off of using FETs. They are fairly quiet when maintaining cruise speed, but the buzz is noticeable when trying to accelerate from a stop.

A sine-wave controller is a completely different animal. They still use FETs, but they manage them in a different way. If the common operation of a FET is like an on/off wall light-switch in a room in your house, a sine-wave is like a dimmer switch, where the applied power is dialed-up with a smooth curve to a peak “on” level, and then a smooth curve back to off."
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