Low-cost PWM speed controller for an electric mini-baja type vehicle

Lucena, Samuel E. de; Marcelino, Márcio Abud; Grandinetti, Francisco José

doi:10.1590/s1678-58782007000100004

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…A harmonic drive (HD) is compact coaxial gear mechanism characterized by high reduction ratios (up to 300:1), no backlash, and a few number of components, which makes it popular in robotics and automotive applications (De Lucena, Marcelino, & Grandinetti, 2007;Gervini, Gomes, & Da Rosa, 2003). A typical HD consists of three main coaxial components: a circular rigid spline, a flexible spline, and a wave generator (Figure 2).…”

Section: Harmonic Drive Part Consolidationmentioning

confidence: 99%

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Cardona

2015

IUJUR

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The goal of this project is to establish a novel design approach for the additive manufacturing of mechanical transmission systems. Our focus is the design and 3D printing of a harmonic drive. Harmonic drives use the elastic dynamics of metals to create an elliptical rotation, which is what conceives the reduction of speed of the outer piece. Additive manufacturing is used to achieve more complex and precise mechanical structures. Components of less complexity will be 3D printed with polymer and commercial parts will be purchased. There is a need for the creation of new plastics manufacturing processes that define and simplify the decision methods involved in the production. With this project, we will establish the process we consider best for plastic additive manufacturing. The decision of which parts are 3D printed or machined affects the harmonic drive’s cost and lead-time; therefore, several alternatives are systematically analyzed. The final bill of materials contains the list of commercial parts and 3D printed parts. When assembled, a functioning harmonic drive is produced. The final harmonic drive is experimentally tested to determine the life of its components when subjected to working loads. The methods used in this research include the part consolidation for the optimization of the system, transcription of 3D models to STL files that can be printed, polymer additive manufacturing and traditional quality control techniques to improve the design. Material models utilized in this project are commercial aluminum parts, 3D printer and plastic, and a low-voltage power motor. The complete set of results will give torque and speed reduction ratios that will be compared to those previously obtained by electronic simulations. This locates us a step ahead in the creation of an optimal process for additive manufacturing.

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Section: Harmonic Drive Part Consolidationmentioning

confidence: 99%

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Cardona

2015

IUJUR

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“…Focusing the talk on the motor selection, the brushless DC (BLDC) motor is highly recommended for electric vehicle applications because of the fast response in achieving the maximum rotation per minute (rpm) with efficient energy usage [11]. There has been a lot of research done in the field of BLDC motor control [12]- [15]. The focus of this research is to reach a target rotation per minute (RPM) in the shortest time possible to save the battery [11] and to have smooth movement between the throttle and motor rotation [16].…”

Section: Introductionmentioning

confidence: 99%

Low-cost portable throttle curve manipulator for smooth initial movement of an electric vehicle

Adiputra

Widodo

et al. 2023

IJEECS

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This research aims to develop a low-cost portable throttle curve manipulator for a smooth initial movement of an electric vehicle. The hardware is mostly made up of an Arduino and a pulse width modulation (PWM)-to- direct current (DC) converter, which can be easily installed in electric vehicle. The manipulator produces a throttle output curve based on the current throttle input. The suitable throttle output curve is investigated in two stages. First, the four throttle curve types are compared based on motor vibration change and total energy usage during initial movement. They are none, linear, exponential, and polynomial curve types with a delay of 1 s. Then, in the second stage, the delay is varied from 0.5 to 2.5 s. The result shows that the linear throttle curve output with a delay of 1 s produces is appropriate to refine the initial movement of an electric vehicle compared to the polynomial and exponential curve types. The brushless DC electric (BLDC) motor vibration change decreases from 148.75 Hz to 107.45 Hz and total energy usage decreases from 90.64 joules to 87.23 joules. Therefore, the research concludes that the low-cost portable throttle curve manipulator can be developed using a linear throttle output curve with a delay of 1 s.

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“…Single-bit modulations such as Pulse Density Modulation (PDM) and Pulse Width Modulation (PWM) are extensively used in telecommunications and power systems while they are employed in a wide variety of applications such as audio amplifiers (Class-D amplifiers [1,2]), signal coding and transmission [3], electric motor controllers (i.e. electric cars) [4], drivers for lasers engravers, servomechanisms, switched-mode power supplies [5] and other.…”

Section: Introductionmentioning

confidence: 99%

Dual-band PWM audio coding for ultrasound artefact reduction

Kaleris

Mourjopoulos

2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-A novel approach to PWM coding is introduced based on generating two complementary PWM streams out of the in-band signal's spectrum. The 2 streams are then recombined in a suitable way, so that out-of-phase cancellation of the carrier frequency harmonics is achieved. The approach suppresses the strong out-of-band frequencies of the carrier signal without introducing distortion of the in-band coded signal. Such method can achieve superior reduction compared to the out-of-band artefact suppression induced by traditional analog low-pass filters employed in typical Class-D audio amplifiers or other switching power delivery systems, hence allowing designs with reduced filter requirements or even filterless implementations.

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Low-cost PWM speed controller for an electric mini-baja type vehicle

Cited by 8 publications

References 4 publications

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Low-cost portable throttle curve manipulator for smooth initial movement of an electric vehicle

Dual-band PWM audio coding for ultrasound artefact reduction

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