C/M EV Motor Research. PDD EESM
C/M CYPRESS MOTOR SPORTS
EV Motor Research. DD EESM Direct Drive
SHRINK DRIVE = COST CUTTING
Not like a Maglev Motor. Not a compact Radial - Raxial or Axial Flux Motor
A third party patented motor made into a hybrid then tweaks to work outside the patent
We do an EESM version with different tweaks & arrive at our standard motor equivalent which pairs with different transmissions or aids a maglev coaster
IN DEFINITION
A 600hp (approx. 450kW) Pseudo Direct Drive (PDD) motor utilizing Electronically Excited Synchronous Motor (EESM) technology is a cutting-edge approach that combines the high torque density of magnetic gearing with the efficiency and variable field capabilities of EESMs.
Here is an opinion based on the current landscape of Magnomatics' PDD technology and EESM trends:
Key Advantages
• Superior Torque & Compactness: By integrating a magnetic gear, a 600hp PDD motor can operate at lower speeds (high torque) while being significantly smaller and lighter than conventional direct-drive motors.
High Efficiency & Lower Operating Cost: EESM designs generally eliminate the need for rare-earth magnets, reducing raw material costs and volatility. When paired with PDD, it offers high efficiency over a wide operating range.
Variable Field Control: Using an EESM rotor (field windings instead of magnets) allows for precise control of the magnetic field. This means higher efficiency at high speeds (field weakening) compared to permanent magnet machines, which often have higher drag losses.
Reduced Maintenance: Unlike mechanical gearboxes, the PDD is a non-contact magnetic gear, leading to high reliability and minimal maintenance.
Potential Challenges
• Complexity & Control: A PDD involves two rotating parts with a magnetic gear, requiring complex control systems, particularly in managing the "pull-out torque" (the limit where the magnetic gear slips).
Thermal Management: Managing heat in the inner rotor field winding (EESM) while also managing the stator windings can be complex at high power densities like 600hp.
Weight & Cost of Copper: While saving on magnets, a large EESM/PDD combo may still require substantial copper for field windings and complex stator winding, affecting the total weight.
Overall Opinion
A 600hp PDD EESM is a highly compelling, albeit complex, solution for high-torque, lower-speed applications (e.g., heavy-duty electric trucks, marine propulsion, direct-drive industrial machinery).
It bridges the gap between conventional direct drives (large/heavy) and high-speed geared systems (unreliable/high maintenance). It offers excellent efficiency, but the engineering challenge lies in controlling the magnetic coupling (transmission) and effectively cooling the field-excited inner rotor.
Pseudo direct drive (PDD) patented by Magnomatics
Patent by Magnomatics reviewed compared to others
Our production Vs R&D experiments have to work around patents, copyright or trademarks in different countries then licencing if that can be obtained
Ours named C/M DD - EESM. Direct Drive instead of EESM Standard Drive then Magnetic Variant Drive EV Motors not Piston for Air or Air Motors or hybrid Air - EV Motors
Think. Rows of 600's compact offers 2400 HP with connected efforts. 2500+
Inverter. Motor. Reducer. Built in cooling system. Space for 2+ other smaller & 1 equal Motor per front - rear axel
WHAT IS REDUCER? AH. SEE
An EV reducer (or reduction gearbox) is a single-speed transmission that converts the high-speed, lower-torque output of an electric motor into the high-torque, lower-speed rotation required to move the vehicle. It acts as a permanent gear reduction, usually with a ratio around 9:1, allowing the motor to operate efficiently.
Key Functions and Benefits
• Torque Multiplication: Because electric motors spin at very high RPMs (up to 20,000+), the reducer uses a small input gear to drive a larger output gear, multiplying torque for fast acceleration and hill climbing.
Speed Reduction: It brings the high motor speed down to a manageable wheel RPM, preventing excessive vehicle speeds and allowing the motor to operate in its most efficient range.
Single-Speed Simplicity: Unlike traditional cars, most EVs use a single-speed reducer because electric motors provide high torque instantly from 0 RPM, eliminating the need for complex, multi-gear transmissions.
Compact & Efficient: Reducers have few moving parts and are highly efficient (often >95%), reducing overall weight and maintenance needs.
Common Configurations
• Two-Stage Reduction: The most common design, often using helical gears for smooth, quiet operation.
Integrated Design: The reducer often includes the differential and is packaged together with the motor and inverter as a single "drive unit" or e-axle.
Without a reducer, an electric motor spinning at 5,000 RPM would cause the car to travel at excessive speeds with low power, making it unsuitable for driving.
Manual Transmissions
A gear reducer (or reduction gearbox) in manual transmissions reduces output speed while increasing torque, allowing vehicles to gain power for heavy loads, steep climbs, or difficult terrain. These systems, which can involve a Dual Speed Input Reducer to decrease the necessary input turns for faster operation, are essential for maximizing torque in manual gearboxes.
Key Aspects of Reducers in Manual Transmissions:
• Function: Transforms high-speed, low-torque input from the engine into a lower-speed, high-torque output, vital for heavy-duty tasks or off-road conditions.
Mechanism: Typically involves a gear train where a smaller input gear drives a larger gear, creating a reduction ratio (e.g., 50:1 or 15:1).
Application: Commonly used in specialized vehicles or heavy machinery to enhance pulling power, allowing vehicles to tackle steep slopes and slippery surfaces.
Damage Mitigation: In certain high-performance vehicles, a restrictor in the clutch hydraulic system acts as a "reducer" to delay the clutch release, protecting the transmission from abrupt, high-force engagements.
Like a Warp Drive just not. So like.
CYPRESS MOTOR SPORTS
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