Sine Wave PWM
More than 30 descrete components
in one Smart Chip
IPM HTM80N08N7T IPM HTM100N08N7T
LEV, HLEV and PHLEV as E-bike, Moped,
Motorcycle and Pedelec. 36-48 V up to 1000 W
Electrical Machines and Drives
LEV, HLEV, PHLEV as Moped, Motorcycle,
Trike and Quadricycle
Class L6e. 48 V; 50-100 A; up to 5000 W
Elettrical Machines and Drives
How And What
The electric machines, motor and generator, are mostly composed of two substantially cylindrical coaxial bodies denominated Stator and Rotor because they are respectively in a fixed position relatively to the frame the first, and rotating around this, the second one.
As known the machine word, refers to an assembly of technical components structured to change the “nature” of the Energy / Power – with yields always less than unity – paying therefore a loss which is more or less high depending of the nature object of the transformation or, in the set of multiple machines, of the cycle of transformations.
From the mechanical point of view, we define the machines as drive unit or operative unit according to the input that feeds them, and the output they produce: in the drive unit called electric motor enters nature “electric” and exits nature “mechanical” in the kinetic energy/power form; in the operative unit calls electric generators occurs the reverse.
A concrete advantage of these electric machines is their bi-functionality in the sense that the same structure, is capable of both transformations with substantially equal efficiency.
Exemplifying the principles and objectives of the electric motor functioning, anyway builded, we can say that it optimizes the effect of a rotating magnetic field created in some way by the stator using an electrical source; this magnetism interacts with the rotor attracting and rejecting it so as to “hook” and drag it into a rotational motion, which by virtue of its mass makes him acquire the aforementioned mechanical power of kinetic type.
Evidently, an electric current to alternating type lends itself naturally to configure rotating magnetic fields, but divide the electrical machines in Direct Current (DC) or alternating current (AC), did not make much sense today, if not in relation to the external source, since even in traditional DC permanent magnet exists a rotating magnetic field so an AC, specifically mechanically obtained thanks to the – sliding contacts device – called “brushes” that connected to the rotor, transform DC in AC current inverting its polarity.
The need for adjustment and the progress of Inverter technology (manipulator of the characteristic parameters of electrical energy: DC, AC, V, f), suggest therefore distinguish electric machine between synchronous and asynchronous in order to the fact that the angular speed of the rotating magnetic field is respectively equal and relatively synchronized with that induced in the rotor, or overtakes it of a small percentage value in the direction of rotation, said “slip”.
The presence or absence of the brushes (brushed or brushless) and of the magnets, fully identifies these machines, including the one called SRM Switched Reluctance Motor.
The characteristic curves obviously differ in different types.
Optimize the operation, management and control of torque and speed of these motors or of electrical output parameters in the case of generators, thus requires to drive these machines like you do with a car or a plane, even so highly sophisticated as required by modern machine tools with numerical control (CNC) in order to the high precision positioning.
Positive and negative accelerations (electric brake feature), speed and position accuracy are possible today to the extent necessary to meet any application thanks to the different technologies used to create, monitor and manage the electromagnetic interaction between the stator and rotor.
The enormous progress of the power electronics and control combined with that computer make it possible unimaginable results even in recent times.
Those who usually call controllers are not only the Inverter because really constitute the complete actioning which can be considered the software that allows the electric machine, to be considered the hardware, to do pretty much what we want and how we want it.
These PCB or PCBA (printed circuit boards or printed circuit assemblies) more or less integrated, they can also perform other functions by exchanging data and information in the local and remote.
Campi gestionali per azionamenti di macchine elettrice
Minimal Powertrain uses proprietary hardware and software in the Electric Drives which equip its vehicles to get high quality width modulation (PWM = pulse-width modulation), sine wave, to manage in the best way the power sent to the Electric Motor and/or absorbed by the Electric Generator.
Optimize thus, two or more of the 4 possible quadrants illustrated in the left graph according to application needs.
In terms of electronic components, Minimal Powertrain uses the innovative Intelligent Power Module (IPM) HTM100N08F7T developed by HTM in collaboration with STMicroelectronics NV that produces it.
Absolute novelty for the drives in this industrial field, this chip includes in itself all the passive components (diodes, resistors, capacitors), the HV gate drivers and mosfets along with all the circuitry associated with huge performance benefits as: Easy Layout and Design, Reduce Total System Cost, Reduced EMI and Noise, Advanced Protection Function, Improve Efficiency and High Quality and Reliability.
Knowing how to fully drive an electric machine running as motor and/or generator, allows you to fully realize the objective of the Recovery of the Kinetic Power (Inertia) possessed by the vehicle and also the production of electrical power for transformation of mechanics power if available on the same.
The philosophy of Minimal Powertrain is not to be a vehicle manufacturer, so also excludes produce and sell Electrical Drives for which the IPM HTM80-100N08F7T as customized product, is available to companies specializing in the sector.
The choice to use in the range of the Minimal Power of interest and in compliance with applicable regulations (eg for pedelec 48V), the highest possible Voltage to achieve the minimum of Joule losses thus ensuring maximum efficiency of electrical equipment and electronics, led to realize this chip for applications up to 100 V